Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 312 371H found under Kit Valve Repair by K W D Manufacturing Inc. The National Stock Number assigned to this part is 4820011039477, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 312 371H.