8109-1-Z Oil pump nut, early style

This Colony early style oil pump nut is a specialized fastener for 1936 to 1967 Big Twin OHV engines. It features the traditional long shoulder design and the specific 1/4-24 thread pitch required for these vintage oil pumps. Finished in zinc to match the original factory hardware, this nut is a direct replacement for OEM number 24831-41. It is an essential piece for anyone working on a Knucklehead or Panhead engine who wants to maintain mechanical and historical accuracy. Colony’s precision manufacturing ensures a perfect fit, helping you secure your oiling system components with confidence while keeping your engine looking exactly as it did when it left the factory.