Thrust Washer Specifications: Dimensions, Materials, Tolerances
Procurement teams rarely buy a thrust washer on name alone. The part has to carry axial load, control crankshaft end float, and survive the lubrication regime set by the engine design. That is why thrust washer specifications should be written against measurable attributes: dimensions, material stack-up, surface finish, hardness, and inspection method. For replacement work, the drawing or sample must also state the acceptable wear window and the measurement temperature, because small thermal shifts can change the reading. Driventus supplies engine and powertrain components for aftermarket, OEM, and remanufacturing programs, with production controlled under IATF 16949:2016 and ISO 9001:2015. Driventus is an independent aftermarket manufacturer; brand names are referenced for fitment only. The sections below give a practical procurement view of what to ask for, what to verify, and where customisation is justified.
What a procurement spec must define
A usable part specification starts with the geometry that controls axial movement and ends with the evidence needed to release the lot.
- Inside diameter, outside diameter, and axial thickness at the controlled measuring points
- Face width, chamfer, oil groove, and any locating feature on the washer pair
- Material family, backing steel grade, and overlay or coating system
- Surface finish, hardness range, and permitted burr height
- Direction of thrust load, assembly orientation, and the target end-play window
- Inspection standard, sampling plan, and traceability code
For replacement programs, record the engine family, the measured worn part, and the OE cross-reference used for identification. OE references such as OE 06A107065 should be treated as fitment references only. If the buyer needs a catalogue view of current part families, see our catalog.
Dimensions and tolerances that matter
For metrology, state whether the dimension is measured at room temperature, after surface cleaning, and with what instrument resolution. A ±0.01 mm tolerance is not useful if the gauge repeatability is worse than the allowed spread.
Material choices and trade-offs
A material callout should also define whether the running face is ground, plated, coated, or oil-retentive. If your programme requires a custom backing or a different coating stack, use custom manufacturing rather than forcing a near-match part into service.
Validation, inspection, and traceability
Where corrosion resistance matters, add a test method to the specification rather than a marketing claim. For many programmes, the right control is a measured coating thickness and a documented salt exposure or oil-compatibility test, not a vague statement about durability.
Sourcing for aftermarket, OEM, and reman programmes
Buying thrust washers for multiple channels is mainly a documentation exercise. Aftermarket distributors want stable availability and clear cross-references. OEM and Tier-1 buyers want repeatable process control. Repair chains want fast identification and low error rates.
Driventus can support those needs with drawings, samples, and controlled production under our manufacturing and quality systems. If you need current engine part families, review our catalog or the wider engine components range. If the part is not a direct match, we can evaluate a revised geometry, alternate backing, or a different coating through custom manufacturing.
Typical sourcing data to send:
- Target application and engine family
- OE or aftermarket cross-reference, if available
- Sample quantity and annual volume
- Required material, coating, and thickness band
- Packaging, label, and traceability requirements
Lead time and MOQ depend on the drawing status, tooling condition, and validation scope. A fully documented release is faster to quote than an incomplete sample-only request.
Frequently asked questions
Include nominal dimensions, tolerance bands, material build, face finish, hardness, assembly orientation, and the end-play target. Add the measurement method, sampling plan, and traceability requirements so receiving inspection can verify the lot without guessing.
Measure the worn sample, compare the stack-up to the target drawing, and confirm the post-assembly end-play window. Use the OE cross-reference only as a fitment pointer, then validate thickness, ID/OD, and face condition against the actual engine application.
Yes. We can review drawings or samples, then propose a matching or revised build with the required backing, coating, and tolerance band. Send the application data, expected annual volume, and any packaging or traceability rules with your enquiry.
If you need a drawing review, OE cross-reference check, or a quote for a custom build, [request a quote](/contact.html)
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