Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BLG276D found under Seat Valve by Hale Products Inc. The National Stock Number assigned to this part is 4820000303447, 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 BLG276D.