NIPPLE (P/N 251-5) - New Surplus

The 251-5 is a male-threaded nipple fitting for aircraft pneumatic systems. This coupling connects two female-threaded ports in fuel, oil, and air lines using secure threaded engagement. Commonly found in Cessna aircraft and other general aviation platforms, the nipple follows AN/AS standard specifications for reliability and compatibility.

Installation requires torque verification per the aircraft maintenance manual to ensure leak-free operation. Material and thread size should be confirmed against your aircraft's Illustrated Parts Catalog before installation.

What is the NIPPLE (P/N 251-5)?

The 251-5 is a male-threaded nipple fitting for aircraft pneumatic systems. This coupling connects two female-threaded ports in fuel, oil, and air lines using secure threaded engagement.

Does the 251-5 meet AN/MS/NAS aviation specifications?

Aircraft hardware is manufactured to military and aviation specifications. The NIPPLE 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 251-5 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 251-5.

Can I order the 251-5 in custom quantities?

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