Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ASTM B687 found under Nipple Pipe by American Society For Testing And. The National Stock Number assigned to this part is 4730001932711, 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 ASTM B687.