INSERT-HELICOIL .33LG (P/N 520112) - New Surplus

The 520112 is a coiled-wire Helicoil insert designed to restore damaged 18 x 1.5 mm spark-plug threads in aircraft cylinder heads. This stainless steel insert reinstates thread integrity when original threads become stripped or damaged during maintenance. Installation requires Continental-specified Helicoil spark-plug tools and must follow the engine manufacturer's maintenance manual procedures.

Commonly used in piston engine cylinder head repairs across general and commercial aviation. The insert provides a permanent solution for thread restoration without requiring cylinder head replacement.

What is the INSERT-HELICOIL .33LG (P/N 520112)?

The 520112 is a coiled-wire Helicoil insert designed to restore damaged 18 x 1. 5 mm spark-plug threads in aircraft cylinder heads.

Does the 520112 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The INSERT-HELICOIL .33LG 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 520112 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 520112.

Can I order the 520112 in custom quantities?

Yes, we sell hardware in various quantities from single units to bulk lots. The INSERT-HELICOIL .33LG is available in: New Surplus. Submit an RFQ for volume pricing or call (904) 998-9101 for quantity availability.