COTTER PIN (P/N an381-1-16) - New Surplus

The AN381-1-16 is a stainless steel cotter pin conforming to AN381 specifications (superseded by MS24665). This split-pin fastener provides mechanical retention for drilled bolts and castellated nuts in aircraft control linkages and structural assemblies. The nonmagnetic, corrosion-resistant material resists oxidation in exposed airframe locations.

Installation requires inserting the pin through aligned holes in the bolt and nut, then spreading the legs to prevent rotation. Widely used in general and commercial aviation for securing flight control connections where reliable, vibration-resistant fastening is essential.

What is the COTTER PIN (P/N an381-1-16)?

The AN381-1-16 is a stainless steel cotter pin conforming to AN381 specifications (superseded by MS24665). This split-pin fastener provides mechanical retention for drilled bolts and castellated nuts in aircraft control linkages and structural assemblies.

Does the an381-1-16 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The COTTER PIN 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 an381-1-16 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 an381-1-16.

Can I order the an381-1-16 in custom quantities?

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