Caterpillar M6 x 1mm Hex Lock Nut 129-3178 is a locks product that secures cab, panel or access-door assemblies. It is listed for Caterpillar heavy-equipment applications; use part number 129-3178 as the primary identification reference.
- Part Number: 129-3178
- Brand: Caterpillar
- Product Category: Locks
- Equipment Type: Generator, Integrated Toolcarrier, Wheel Tractor-Scraper, Wheel Harvester, Machine Control & Guid, Wheel Skidder
- Compatible Models: SR4B, XQ330, XQP500, SR4, SR5, IT38H, IT38G, IT14G, IT38F, IT62G, IT62H, IT14G2, IT24F, IT28G, IT28F, IT62G II, IT18F, IT38G II, 627, 623, 621, 637, 632, 631, 623K LRC, 631K, 613G, 637K, 627K LRC, 623K
- Engine Models: C175, C27, C32, C7, C9, C18, C9.3, C4.4, C11, C13, C15, C280
- Condition: New
Fitment can vary by machine configuration and serial-number range. Compare the original part number, dimensions, connectors and mounting points before purchase.





