Pump Unit Fastener CSM3X18 - O.S. Engine OS29067120  [OS29067120]

O.S. ENGINES PUMP UNIT FIXING SCREW CSM3X18 91HZ-PS
Price:
£3.19
Brand:
O.S. Engine
Model:
OS29067120
GTIN:
4531028144040
Condition:
Brand New
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Secure mounting for pump assemblies

This is an RC-scale pump unit fixing screw produced under the O.S. Engine part number OS29067120, identified by the CSM3X18 designation. It is meant to secure pump assemblies on O.S. Engine pump units and associated RC engine pump hardware, acting as a direct replacement or spare when servicing.

For correct installation, protect the thread profile and alignment: insert the screw square to the mating hole, ensure components are flush, and tighten gradually to avoid cross-threading. Do not overtighten, as this may damage pump housings or strip threads; examine the screw from time to time for thread wear or deformation.

During maintenance and setup, this fixing screw helps preserve pump alignment and seal seating so performance remains repeatable. Stocking a spare screw reduces workshop delays when a fastener needs replacing.

Can I order this screw on its own?

Yes; the part is identified as O.S. Engine OS29067120 with the CSM3X18 designation and is commonly available as an individual replacement fastener. Confirm the part number before ordering to ensure correct fitment.

How can I verify this is the correct part for my pump?

Compare the part number OS29067120 and the CSM3X18 marking with your existing screw or the pump documentation. Check thread form and length against the mating hole to be certain of compatibility.

Is this compatible with third-party pump units?

Compatibility with third-party pumps depends on matching thread size and length. While the screw is intended for O.S. Engine pump units, measure the receiving thread before attempting to fit it to other brands.

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