NUT,PLAIN,SLOTTED,HEXAGON (P/N an320-9) - New Surplus

The AN320-9 is a plain, slotted hexagon nut with 9/16-18 UNF threads designed for shear-loaded fastener applications. This steel nut features a castellated (slotted) design that accepts a cotter pin for positive locking on drilled fastener shanks. Commonly paired with clevis bolts and taper pins in aircraft structural joints where shear loads predominate.

Installation requires threading the nut onto the drilled bolt shank and securing with a cotter pin inserted through the slots and bolt hole, preventing rotation and vibration loosening during flight operations.

What is the NUT,PLAIN,SLOTTED,HEXAGON (P/N an320-9)?

The AN320-9 is a plain, slotted hexagon nut with 9/16-18 UNF threads designed for shear-loaded fastener applications. This steel nut features a castellated (slotted) design that accepts a cotter pin for positive locking on drilled fastener shanks.

Does the an320-9 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The NUT,PLAIN,SLOTTED,HEXAGON 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 an320-9 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 an320-9.

Can I order the an320-9 in custom quantities?

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