Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NM81749B found under Valve Core by Paxman Diesels Ltd. The National Stock Number assigned to this part is 2640000501229, and the Federal Supply Class is 2640 Tire Rebuilding And Tire And Tube Repair Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like NM81749B.