Spacer Washer Ring 20mm

The 20 mm washer/spacer ring with dimensions 25×2×25 is a mounting and spacing component used in high-pressure pump assemblies. In pump service it acts as a locating washer that helps keep correct part positioning, maintains assembly geometry, and supports repeatable operation of the pump section.

MPN / reference: 40.516
Weight: 0.060 kg
Dimensions / size: 25×2×25
Material note: “brass” may appear in keywords - material is not confirmed unless stated in the product specification.

APPLICATION

Washer used in pump and pressure washer service work, including:

• assembly and spacing adjustment in the pump section during refurbishment,
• replacing locating parts after pump disassembly,
• repairs where correct clearances and seating are critical,
• seal service when the washer is a cooperating component within the sealing pack.

SYMPTOMS - WHEN IT’S WORTH REPLACING

Typical reasons to replace the washer/ring:

• visible wear, grooves, or deformation on the washer surface,
• uneven seating of parts in the pump assembly after reassembly,
• difficulty achieving correct fitment after refurbishment,
• recurring leaks or unstable operation after repair (when spacing affects seals),
• rubbing marks on cooperating parts indicating incorrect spacing.

HOW TO CHOOSE THE RIGHT PART

Select the spacer washer precisely - thickness has a direct impact on assembly:

• by manufacturer MPN / reference: 40.516,
• by dimensions: 25×2×25 (diameters and thickness),
• by comparison with the removed part: verify thickness, surface condition, and installation orientation.

Incorrect thickness or diameter can lead to improper seal pack seating and accelerated wear.

COMPATIBILITY

Compatibility should be determined based on MPN 40.516 and the 25×2×25 size according to pump documentation/parts table.
Selecting only by the description “20 mm washer” without verifying reference and dimensions is not recommended.

[faq]

What is the washer/ring used for in a high-pressure pump?|It’s a locating/spacer element that helps maintain correct positioning and seating of parts inside the pump assembly. Proper spacing affects assembly and can influence seal performance.
Can I select the washer only by the 25×2×25 dimensions?|Dimensions are key, but the safest approach is confirming selection by MPN 40.516 and pump documentation. In practice, tolerances and the exact installation position also matter.
Can I use an alternative (e.g., a different material)?|Only if dimensions and thickness match exactly and the part is intended for that pump assembly. Changing material without specification confirmation may affect wear of cooperating parts, so the MPN and technical data should be your reference point.

[/faq]