AN818-12D

Fluid-line connection hardware including tube and pipe fittings, adapters, elbows, tees, unions, couplings, nipples, and bushings used to join, branch, and terminate hose, pipe, and tube.

A tube coupling nut fitting.

Reading the part number. AN818-12D breaks down as AN818 — the Air Force-Navy design standard that fixes the part's design — plus the dash/suffix code 12D, which selects the exact size, material, or finish variant from the tables on that standard. Two parts sharing the AN818 base are the same design in different variants.

Price in context. Across the 317 items we currently stock in FSC 4730 (Fittings and Specialties; Hose, Pipe, and Tube), published unit prices run from $0.38 to $11,915.64. At $5.25, this item sits well below the class median of $26.28 — commodity hardware usually bought in volume.

Who orders AN818-12D. Aircraft owners and MRO shops replacing standard hardware, machine shops and OEMs filling a bill of materials, and government contractors sourcing against NSN 4730-00-287-0285. You can order by part number or by stock number — it is the same item, the same published price, and the same quote form.

Applicable standards. MS/AN flare and flareless fittings, SAE J514, MIL-DTL; steel, stainless, brass, and aluminum.

Need this part modified, or a similar part made to your print? See our U.S.-based CNC machining services and aerospace machining capability.