NUT (P/N an310-5) - New Surplus

The AN310-5 is a steel castle nut with a 5/16-24 UNF thread for aircraft fastener applications. This nut features castellations (notches) that align with a drilled bolt shank to accept a cotter pin, providing positive mechanical retention. Commonly used to secure control-system linkage bolts and other critical connections where fastener lockout is required.

Installation involves torquing to specification per FAA AC 43.13-1B, then aligning the castellations with the bolt's cotter-pin hole and inserting the pin to prevent rotation. Standard in general aviation and MRO maintenance.

What is the NUT (P/N an310-5)?

The AN310-5 is a steel castle nut with a 5/16-24 UNF thread for aircraft fastener applications. This nut features castellations (notches) that align with a drilled bolt shank to accept a cotter pin, providing positive mechanical retention.

Does the an310-5 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 an310-5 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 an310-5.

Can I order the an310-5 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.