STUD (P/N 31c12) - New Surplus

The 31C12 is a steel exhaust stud designed for Lycoming piston engines in the O-235 through O-540 series. This fastener secures the exhaust flange to the cylinder head, maintaining a leak-free seal in the engine's exhaust system. Installation requires torquing to Lycoming engine manual specifications and verification against your aircraft's Illustrated Parts Catalog.

Commonly used in general aviation aircraft powered by Lycoming engines during exhaust system maintenance and overhaul.

What is the STUD (P/N 31c12)?

The 31C12 is a steel exhaust stud designed for Lycoming piston engines in the O-235 through O-540 series. This fastener secures the exhaust flange to the cylinder head, maintaining a leak-free seal in the engine's exhaust system.

Does the 31c12 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The STUD 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 31c12 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 31c12.

Can I order the 31c12 in custom quantities?

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