DKO-ADAP

Hydraulic Gauge Port Adapters — IKIN by TIME Hydraulic

Choose a straight or 90-degree DKO hydraulic gauge port adapter by defining both sides of the connection: the tube-fitting interface already on the machine and the test point, hose, sensor, or pressure gauge being added. TIME Hydraulic reviews the connection geometry, quantity, fluid, pressure requirement, and access envelope before assigning a part.

  • Engineer-reviewed quote within one business day
  • Prototype parts ship in 3 working days after drawing approval
  • 100% inspection before packing
  • Part number, drawing, or measured photograph accepted
Send Port Details for a Quote
Straight DKO Hydraulic Gauge Port Adapter by IKIN

Your drawings and specifications are treated as confidential and are not shared outside the people quoting and making your part.

Gauge Port Adapters and Test Point Fittings at a Glance

A hydraulic gauge port adapter brings diagnostic access to an existing hydraulic connection without making the gauge thread the machine-side standard. The DKO end seals at a metric 24-degree cone and O-ring face; the diagnostic branch is a separate interface, so both ends belong on the same drawing.

Published product forms
TP straight, 90-degree elbow, bulkhead BH, 24-degree male cone DKO, and stud-end variants
Diagnostic interface
M16 x 2 where the selected design uses the ISO 15171-2 connection end
Trial order
Starts from 100 pieces, with your own logo included
Sample dispatch
Normally 3 working days; charging depends on the item
Production schedule
10–30 working days, confirmed with the quotation
Quality warranty
3-year quality warranty

The first drawing decision

Record the line-side end and the diagnostic-side end as two separate specifications. That one discipline prevents the common mistake of ordering the right M16 x 2 test connection on the wrong DKO tube series, or the right DKO end with the wrong gauge connection.

Start Trial Order

Test Port and Thread Families We Cover

A hydraulic test port gives repeatable access for pressure measurement, but the name alone does not identify complete device geometry or features. A useful RFQ states the existing connection, the diagnostic route to be added, and the direction in which the gauge or hose must leave the line.

Published TIME Connection Forms [SPEC-01]

  • TP Straight Adapter Use an inline body where the pressure gauge, test hose, or sensor can leave the connection on the same axis and there is enough wrench and service clearance.
  • 90-Degree Elbow Adapter Turn the diagnostic branch where a straight assembly would collide with a guard, tube, valve block, or adjacent fitting. Define orientation on the drawing because an elbow that clears at assembly can still obstruct service access.
  • Bulkhead BH Form Route the measuring connection through a panel or mounting surface when the operator needs access away from the live line. Include panel thickness, hole geometry, and the side from which the nut is installed.
  • 24-Degree Male Cone DKO Mate with the corresponding metric 24-degree female swivel geometry after tube outside diameter, thread, and light or heavy series are confirmed. The cone and O-ring create the seal; the thread supplies assembly load.
  • Stud-End Variant Use a stud end when the adapter enters a threaded port rather than an opposing DKO swivel. Port thread and sealing method must be named together because a straight thread, pipe thread, and O-ring port do not seal the same way.

Straight and 90-Degree Access Decisions [MATRIX-A]

Installation Condition Straight Body 90-Degree Body Drawing Input
Axial space above the connection Keeps the shortest and simplest flow path when the gauge or hose can leave on-axis Moves the diagnostic route sideways where a cover or structure blocks the axis Available height from the sealing face to the first obstruction
Wrench access Works where the nut and adapter hex remain reachable after installation May improve access, but the elbow can also cover the neighboring hex if clocked incorrectly Wrench envelope and assembly sequence
Direct gauge mounting Places instrument mass in line with the connection Changes the gauge center of gravity and viewing angle Gauge diameter, mass, orientation, and vibration condition
Microbore hose routing Requires room for the hose to leave without an immediate forced bend Can point the hose toward a protected route and reduce the first bend Minimum bend route, clamp position, and moving-clearance envelope
Service removal Fewer orientation variables during replacement Needs clocking control so the replacement returns to the same accessible direction Reference face, angular orientation, and no-go zone
Service clearance belongs on the print: A 90-degree adapter is not automatically the compact choice. The elbow may solve vertical clearance while making the nut, test hose, or protective cap harder to reach, so show both the installed envelope and the intended service movement.

Shared Interface, Different Product Families [MATRIX-B]

Term What it identifies What still needs confirmation
MINIMESS® 1620 A Hydrotechnik commercial product-family name associated with an M16 x 2 diagnostic connection Mating design, valve behavior, material, pressure, fluid, and supplier-model compatibility
Test 20 A STAUFF commercial family name used around an M16 x 2 test connection Drawing, rating, seal, hose or gauge end, and the exact counterpart
M16 x 2 test point A metric diagnostic connection description standardized by ISO 15171-2 The machine-side or line-side end and product-level performance
DKO 24-degree cone A tube-connector sealing form within the ISO 8434-1 family Whether a diagnostic branch exists at all
Self-sealing valve function: In a diagnostic test point, the internal check valve remains closed until the mating probe or hose end operates it, then closes after disconnection. The valve is part of the diagnostic coupling design; it should not be assumed from an M16 x 2 thread visible on an unidentified component.

DGUV records that visually similar metric and inch threads can partly assemble without making a pressure-resistant joint. Parker’s engineering guide starts identification with taper, pitch, size, and standard designation, while a microbore-hose discussion shows why the gauge, hose, and adapters should be specified as one diagnostic route. These are not interchangeable shortcuts: each trade-off belongs in the drawing and RFQ before the wrong call reaches assembly.

Build the Measuring Side Around the Job [SPEC-02]

  • Direct Pressure Gauge Direct mounting removes the hose run and makes a compact local indicator possible. Check instrument mass, vibration, viewing angle, connection gender, thread form, and the room needed to install or remove the gauge.
  • Microbore Test Hose A hose moves the gauge to a safer or more readable position and can simplify work on crowded mobile equipment. Confirm both hose ends, bore family, length, bend route, pressure duty, and whether the connection is intended for repeated diagnostic use.
  • Pressure Transducer A transducer adds electrical connector access, cable strain relief, sampling rate, and mounting orientation to the hydraulic questions. Define the mechanical adapter and the instrument specification as separate items so a correct thread does not hide a poor sensor installation.
  • Portable Diagnostic Kit A kit standardizes gauges and hoses only if every machine-side adapter is labeled and controlled. Organize by connection family and mating geometry rather than equipment nickname, then keep the straight and 90-degree forms distinct.

Port-First Selection Path [MATRIX-C]

Use this matrix to identify the family already on the equipment. It is an identification guide, not a statement that every row is a stock TIME configuration.
Connection Family Visible or Measurable Cue Seal Location Frequent Wrong Assumption
DKO 24° cone Metric thread, swivel nut, 24° inner cone; confirm tube OD and L/S series O-ring at the cone face Calling any metric swivel a DKO, or assuming DKO itself means test point
JIC 37° flare UN/UNF straight thread with a 37° metal flare seat Metal-to-metal flare Confusing it with a 45° flare or a metric cone
ORFS Flat face with a visible O-ring groove O-ring on the flat face Matching only the thread and missing the face seal
BSPP Parallel pipe thread; inspect the cone, washer, bonded seal, or port face Outside the thread Treating every G thread as the same sealing arrangement
SAE / ORB UN/UNF straight thread with an O-ring near the stud shoulder O-ring in the port counterbore Assuming a shared thread means it seals like JIC
NPT / NPTF Tapered pipe thread; diameter changes along the engagement Thread interference Forcing it into BSPT because the first turns appear to engage
JIS 30° flare 30° seat with Japanese standard context; some forms use BSPP threads Metal flare seat Calling it JIC because both ends look flared
Komatsu-style metric Metric thread with a 30° sealing seat on relevant equipment families Metal cone Selecting by equipment brand without measuring the actual end
Check a DKO or Gauge Connection

Sealing Forms, Materials and Corrosion Protection

Material selection follows only after the fluid, temperature, environment, pressure duty, and mating components are known. Carbon steel, stainless steel, and seal-compound names are broad categories; actual service suitability depends on the adapter specification and the complete operating conditions.

Three sealing mechanisms to keep separate

Cone and O-Ring

The DKO O-ring seals at the 24-degree cone face while the swivel thread generates clamping load. Inspect the cone and O-ring land rather than applying pipe-thread sealant to a non-thread-sealing connection.

Face or Shoulder O-Ring

ORFS and O-ring boss connections place the elastomer at a flat face or port counterbore. The thread may look familiar while the sealing surface and groove geometry are entirely different.

Tapered Thread

NPT-family connections develop their seal through tapered thread engagement and the specified sealing practice. A straight hydraulic thread that starts into the port is not a substitute.

Material and fluid review at quotation

Hydraulic fluid PG. 01
Why it changes the selection

Mineral oil, water-glycol, biodegradable fluids, fuels, and process liquids expose seals and metals differently.

What to send

Fluid trade name, base type, and concentration where relevant.

Temperature PG. 02
Why it changes the selection

Elastomer behavior, viscosity, corrosion rate, and metal expansion change across the service range.

What to send

Minimum, continuous, and short-duration maximum.

Environment PG. 03
Why it changes the selection

Outdoor salt, washdown, chemicals, mine dust, and indoor mobile service create different corrosion and cap requirements.

What to send

Location, contaminants, cleaning method, and desired service interval.

Mating material PG. 04
Why it changes the selection

Hardness, coating, and galvanic pairing affect thread damage and corrosion at the connection.

What to send

Existing fitting or port material and surface condition.

Seal service PG. 05
Why it changes the selection

Static sealing and repeated diagnostic connection place different demands on the O-ring and valve.

What to send

Connection frequency, dwell time, and any leakage limit.

Important Note PG. 06
Do not select an O-ring by temperature alone

NBR and FKM labels describe material families, not guaranteed service in every fluid or duty cycle. Send the fluid and temperature together so the quoted seal can be reviewed against the complete application.

SPREAD 1 / 3

Thread, Pressure and Temperature Specifications

This is an abbreviated list of connection families and the standards that define their geometry. Pressure, proof pressure, connection-under-pressure capability, and temperature are product-level data for the selected TIME adapter and quotation; a thread name alone does not establish them.

Straight DKO Pressure Gauge Adapters
M16 x 2
24° DKO
37° JIC
0° ORFS
55° BSPP
60° NPT
30° JIS
90° O-ring

Diagnostic test coupling

M16 x 2
Reference ISO 15171-2:2016
Decision Boundary Defines the diagnostic connection end; application conditions still control product use

DKO O-ring seal cone

24°
Reference ISO 8434-1:2018
Decision Boundary Identifies the connector family, not a TIME rating

JIC flare

37°
Reference SAE J514 family
Decision Boundary Seat angle and thread both need confirmation

ORFS

Flat face, 0° reference plane
Reference ISO 8434-3:2005 family
Decision Boundary O-ring groove and face condition matter beyond thread size

BSPP

55° thread form
Reference ISO 228-1 family
Decision Boundary Parallel thread does not identify the final seal arrangement

NPT

60° thread, 1:16 taper
Reference ASME B1.20.1-2013 (R2018)
Decision Boundary Dimensional conformity does not establish adapter working pressure

JIS flare

30°
Reference JIS B8363 family
Decision Boundary Some related forms use BSPP threads; the seat still differs from JIC

SAE straight-thread O-ring port

O-ring at 90° port face
Reference SAE J1926/1_202301
Decision Boundary New-design guidance favors ISO 6149; installed ports must still be identified directly

Why the table stops at interface facts

ISO 8434-1 states that its pressure values are not guaranteed minima, and ISO 19879 treats performance evaluation as a separate testing activity. The quoted adapter therefore needs model-level pressure, fluid, temperature, seal, and acceptance criteria before release.

Request a Model-Specific Drawing

Pricing, Lead Times and Order Terms

Cost is driven by connection geometry, material, seal, quantity, inspection scope, marking, and packing rather than a single price for a “part type.” Send an accurate drawing or measured record of the existing connection with the required quantity, so the quotation can resolve both fit and commercial terms.
SPEC.01

What moves the quotation

Driver Effect on the order How to keep it controlled
Standard versus custom ends Custom thread, cone, branch, or wrench geometry adds drawing and production work Send the mating drawing or a traceable sample before the quote
Straight versus 90° body Elbow orientation and clearance can change tooling and inspection points Dimension the clocking and no-go envelope
Material and seal Fluid, temperature, corrosion exposure, and availability change the selected construction State the complete duty rather than naming a preferred material alone
Quantity and logo Setup and marking cost is distributed across the batch Give trial, annual, and call-off quantities where available
Inspection documents Additional acceptance records need to be scoped before production List every document and acceptance criterion in the RFQ
SPEC.02

Committed order timing

Stage Timing Trigger
Engineer-reviewed quotation Within one business day Complete connection and quantity information received
Prototype parts 3 working days Drawing approval
Small-batch orders 10 working days Drawing approval
Production runs 10–30 working days Schedule confirmed with the quotation
Samples Normally dispatched in 3 working days Item and sample charge confirmed
TERMS.03

Order terms

  • Trial orders start from 100 pieces, with your own logo included.
  • Payment is 30% T/T deposit with the order and 70% T/T balance before delivery.
  • We ship EXW, FOB, CIF and CFR, loading from Shanghai or Ningbo; the trade term is confirmed per shipment at order stage.
  • Your drawings and specifications are treated as confidential.
Get an Engineer-Reviewed Quote

Inspection, Traceability and Warranty

We run 100% inspection before packing — every piece rather than a sample drawn. Material traceability is held through production, and the product family has passed fatigue testing.

Order controls

SYS.CTRL

Connection review

The drawing separates line-side geometry, diagnostic-side geometry, seal, series, orientation, and application inputs.

Production traceability

Material identity is carried through the manufacturing record for the order.

Finished-part inspection

Every piece is inspected before packing against the order definition.

Document release

We hold current ISO and SGS certificates, and they go out with the quotation.

3-Year Quality Warranty

Products carry a 3-year quality warranty.

100% Finished-Part Inspection

Every piece is inspected before packing rather than relying on a sampled lot alone.

Drawing-Controlled Release

Acceptance is tied to the agreed part definition, so the connection family and the selected product rating remain separate decisions.

Put qualification requirements into the purchase specification

If the application needs a model-specific proof, leakage, cyclic, coating, material, or fluid-compatibility record, name it before the drawing is approved. A standard thread designation and a company certificate do not replace the product-level acceptance criteria on the order.

How to Order: From Part Number to Delivery

Straight DKO Pressure Gauge Adapters

Order Process

STEP 01: REFERENCESend whatever reference is available—a stamped part number, a controlled drawing, or a clear photograph with a ruler beside the connection.

STEP 02: IDENTIFICATIONDescribe both sides separately: the DKO or port end and the pressure gauge, test hose, sensor, or M16 x 2 diagnostic end.

STEP 03: APPLICATION DUTYAdd the duty, including fluid, required pressure, pressure spikes, temperature range, environment, and connection frequency.

STEP 04: INSTALLATIONRecord access constraints: straight or 90-degree preference, wrench clearance, hose route, and nearby obstructions.

STEP 05: REVIEW & APPROVALApprove the drawing after TIME returns an engineer-reviewed quotation and resolves open fit questions.

STEP 06: QUALITY & DISPATCHRelease shipment only after inspection against the order definition and confirmation of dispatch terms.

A usable cross-reference package

Best case: controlled drawing

Show the complete adapter, both mating ends, thread callouts, tube OD and series, sealing faces, straight or 90-degree orientation, material and seal requirement, and every acceptance dimension. Add the machine or assembly reference so the engineering review can distinguish a production replacement from a new installation.

Workable case: old part and measurements

Photograph the whole part and each end square to the camera, include a ruler or caliper reading, and record pitch with a gauge. Add the equipment make and model as context, but do not use the machine name as a substitute for measuring the actual connection.

Keep the original sealing surfaces visible

Clean oil and loose dirt without grinding, filing, or forcing a comparison fitting into the old part. Damage from identification attempts can erase the cone, O-ring land, taper, or first full thread that the cross-reference depends on.

Measurement record for an unidentified end

How to capture it

Caliper reading across the male thread or inside the first full female thread.

Why it matters

Narrows the nominal size without relying on appearance.

How to capture it

Metric pitch gauge or threads-per-inch gauge against a backlight.

Why it matters

Separates look-alike metric, BSP, and UN families.

How to capture it

Compare diameter at two points along the thread.

Why it matters

Separates parallel connections from pipe-thread interference seals.

How to capture it

Photograph and measure the cone or flat face.

Why it matters

Distinguishes 24°, 30°, 37°, flat-face, and port O-ring forms.

How to capture it

Record tube OD and any L/S marking for DKO.

Why it matters

Prevents a same-thread, wrong-series selection.

How to capture it

Show both mating ends and the desired hose or gauge direction.

Why it matters

Prevents swapping the machine side and the measuring side.

Where These Test Point Fittings Are Used

Hydraulic gauge port adapters provide temporary access for pressure tests, repeatable condition checks, commissioning, troubleshooting, and permanent sensor access when the full connection is engineered for the job. Common locations include pumps, valves, cylinders, manifolds, test hoses, mobile machinery, construction equipment, and industrial hydraulic systems.

Mobile Equipment Service - Excavator hydraulic test point
01

Mobile Equipment Service

Route a hose or pressure gauge away from guards and crowded valve blocks, then confirm the correct diagnostic coupling for the machine. See the excavator hydraulic test point application.

Crane Diagnostics hydraulic test fittings
02

Crane Diagnostics

Define pressure-measurement access around load-holding circuits, limited wrench space, and scheduled inspection routes. Review the crane hydraulic test fittings application.

OEM and Retrofit Lines diagnostic chain
03

OEM and Retrofit Lines

Add an accessible test point without treating a convenient thread as proof of fit. The hydraulic test hoses and fittings hub shows the wider diagnostic chain.

Portable Gauge Kits interface
04

Portable Gauge Kits

Standardize the gauge-side or hose-side interface while keeping machine adapters labeled by family. This reduces field improvisation without claiming universal compatibility.

Permanent Sensor Access mounting position
05

Permanent Sensor Access

Use a branch or bulkhead route where an instrument needs a stable mounting position. Gauge mass, vibration, impulse behavior, and service access belong in the application review.

Test Hose Assemblies system
06

Test Hose Assemblies

Match the adapter to the hose end and test point as one system. Compare related test hose end fittings when a remote gauge is preferable to direct mounting.

Manufacturing and supply record

TIME Hydraulic began in 2009, moved into its own development work in 2014 through wind-power applications, and built its Changzhou plant in 2017 on a 5,000 square metre site. Companies we have supplied include SANY, XCMG, Zoomlion, CRRC, Hengli, Caterpillar, Parker, HAWE, Bucher and Argorhytos.

When a Gauge Port Adapter Is the Wrong Choice

A well-specified adapter solves the connection problem; it does not make every measurement route safe, representative, or mechanically sound. Use the alternative in the right column whenever the installation objective calls for a different component.
  • SITUATION 01

    The machine already has a supported diagnostic nipple

    Why it works against you
    Breaking into the line adds joints, installation work, and another possible leak path.
    Better Route
    Use the correct test hose or direct gauge adapter for the existing nipple.
  • SITUATION 02

    The gauge is heavy or exposed to vibration

    Why it works against you
    Direct mounting transfers instrument mass and vibration into the line connection.
    Better Route
    Use a microbore test hose and supported gauge position.
  • SITUATION 03

    The task is routine flow measurement

    Why it works against you
    A static gauge branch does not measure flow and may not reveal dynamic loss.
    Better Route
    Use a suitable flow meter or a designed diagnostic test station.
  • SITUATION 04

    The fluid sample must represent the main flow

    Why it works against you
    The easiest pressure port may sit in a stagnant or unrepresentative branch.
    Better Route
    Choose a sampling point and method for the sampling objective.
  • SITUATION 05

    The work is servicing under stored hydraulic energy

    Why it works against you
    A diagnostic coupling does not replace the machine’s isolation and energy-control procedure.
    Better Route
    Follow the equipment manufacturer’s servicing and hazardous-energy instructions.
  • SITUATION 06

    The only evidence is that the threads start

    Why it works against you
    Near-fit metric and inch combinations can engage without forming a pressure-resistant seal.
    Better Route
    Stop and identify taper, pitch, diameter, seat, seal, and applicable series.

Diagnostic Adapter Engineering Tools

Adapter RFQ Readiness Checklist

Verify your Request for Quote inputs, including line-side geometry, seal type, and series prior to submission.

Access Tool

DKO Interface Definition Builder

Define the exact metric 24-degree cone interface specifications for your diagnostic measuring side.

Access Tool

Gauge Test Point Connection Checker

Verify the compatibility between your direct pressure gauge instruments and standard machine-side test points.

Access Tool

Straight vs 90-Degree Access Selector

Evaluate installation clearance and wrench access to determine whether a straight body or 90-degree elbow is required.

Access Tool
Knowledge Base

Hydraulic Gauge Port Adapter FAQs

It adds a pressure-gauge, sensor, test-hose, or diagnostic connection to an existing hydraulic port or tube connection. The adapter must define the line-side seal and the measuring-side connection separately.

A hydraulic test point is a normally closed diagnostic coupling that opens when the mating probe or hose is connected. ISO 15171-2:2016 covers an M16 x 2 diagnostic interface used for this purpose.

No. DKO describes a metric 24-degree cone and O-ring sealing form within the ISO 8434-1 family; a test point is a separate diagnostic connection that may be incorporated into a DKO adapter.

They are related, but not universal synonyms. MINIMESS and Test 20 are commercial family names, while M16 x 2 identifies a standardized connection end; model-level valve, rating, material, and mating details still need confirmation.

Record the metric thread diameter and pitch, tube outside diameter, light or heavy series, 24-degree cone condition, O-ring position, and male or female end. A close photograph with a ruler and the opposite mating part reduces ambiguity.

Choose straight where axial space, wrench swing, gauge mass, and hose routing are clear. Choose 90 degrees when the diagnostic branch needs to turn away from guards or adjacent fittings, and define elbow orientation on the drawing.

Some near-size combinations may start, but partial engagement is not proof of a safe connection. Identify taper, pitch, diameter, seat, and seal before assembly; DGUV has documented dangerous metric/inch mix-ups.

Use a correctly rated test point and microbore test hose, then connect the gauge at a supported location. Match the gauge thread and the diagnostic coupling independently, and follow the machine procedure for live testing.

The answer belongs to the selected TIME model, size, material, seal, fluid, and duty cycle; a thread standard alone cannot supply it. Send the maximum system pressure, spikes, minimum and maximum temperature, fluid, and desired connection behavior for the quotation.

Engineer-reviewed quotations are returned within one business day. Prototype parts ship in 3 working days after drawing approval.

Trial orders start from 100 pieces, with your own logo included.

TIME Hydraulic

Hydraulic test connections

Test points, microbore hoses and gauge connectors for dependable hydraulic diagnostics.

Changzhou Time Machinery Technology Co.,Ltd

Shanghai Ikin® Hydraulic Co, Ltd.

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