Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BK7 ITEM 25 found under Connector Diaphragm by Industrial Service And Supply Inc. The National Stock Number assigned to this part is 4730012064741, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BK7 ITEM 25.