NUT (P/N an320-3) - New Surplus

The AN320-3 is a shear castellated hex nut manufactured from steel for aircraft fastener retention. This nut secures drilled-shank clevis bolts and taper pins in shear-loaded joints, with castellations designed to accept a cotter pin for positive locking. Installation requires torquing per AN standards and aircraft maintenance manual specifications.

The cotter pin passes through the bolt's drilled shank and through the nut's castellated slots, preventing rotation and unintended loosening during flight operations. Commonly used in control linkages, structural attachments, and landing gear assemblies.

What is the NUT (P/N an320-3)?

The AN320-3 is a shear castellated hex nut manufactured from steel for aircraft fastener retention. This nut secures drilled-shank clevis bolts and taper pins in shear-loaded joints, with castellations designed to accept a cotter pin for positive locking.

Does the an320-3 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 an320-3 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 an320-3.

Can I order the an320-3 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.