NUT (P/N 646605) - New Surplus

The 646605 is a 1/4-28 UNF-2B hex nut for Continental piston engines. This steel fastener secures engine hardware on Continental IO-240 and IO-360 assemblies. The nut features standard hex geometry with unified fine thread pitch for reliable clamping force in engine applications.

Installation requires torque specification per the Continental engine maintenance manual. Verify part compatibility with your aircraft's Illustrated Parts Catalog before installation.

What is the NUT (P/N 646605)?

The 646605 is a 1/4-28 UNF-2B hex nut for Continental piston engines. This steel fastener secures engine hardware on Continental IO-240 and IO-360 assemblies.

Does the 646605 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The NUT conforms to its applicable AN (Air Force-Navy), MS (Military Standard), or NAS (National Aerospace Standard) specification. Contact us for specific specification details.

What material is the 646605 manufactured from?

Aviation hardware is available in various materials including cadmium-plated steel, stainless steel, aluminum alloy, and titanium depending on the application. Contact us for material certification and specifications for the 646605.

Can I order the 646605 in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The NUT is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.