NUT-CASTLE HEX .31-24 (P/N 530412) - New Surplus

The 530412 is a hex castellated nut for 0.31-24 (5/16-24 UNF) threads that secures drilled-shank bolts with a cotter pin. Steel construction aligns with AN310 castle-nut specifications for positive locking on control and structural attachments. The castellated design features slots that align with a hole in the bolt shank, allowing a cotter pin to pass through and prevent loosening under vibration.

Install on a drilled bolt or stud, torque per aircraft maintenance manual, then insert the cotter pin through aligned slots. Common in general aviation and commercial aircraft where reliable fastening of critical joints is required.

What is the NUT-CASTLE HEX .31-24 (P/N 530412)?

The 530412 is a hex castellated nut for 0. 31-24 (5/16-24 UNF) threads that secures drilled-shank bolts with a cotter pin.

Does the 530412 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The NUT-CASTLE HEX .31-24 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 530412 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 530412.

Can I order the 530412 in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The NUT-CASTLE HEX .31-24 is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.