NUT (P/N an310-4) - New Surplus, New

The AN310-4 is a steel castellated hex nut with 1/4-28 UNF threads designed for aircraft control linkages and structural assemblies. The castellated design features radial slots that align with a drilled bolt shank, allowing a cotter pin to pass through for positive locking under vibration. Installation requires torquing the bolt to specification, rotating the nut until a slot aligns with the hole, then inserting and bending the cotter pin.

This dual-retention method prevents loosening during flight operations. Follow AC 43.13-1B safety wire practices and verify applicability in your aircraft's maintenance documentation.

What is the NUT (P/N an310-4)?

The AN310-4 is a steel castellated hex nut with 1/4-28 UNF threads designed for aircraft control linkages and structural assemblies. The castellated design features radial slots that align with a drilled bolt shank, allowing a cotter pin to pass through for positive locking under vibration.

Does the an310-4 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 an310-4 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 an310-4.

Can I order the an310-4 in custom quantities?

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