Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AWSA5.8-81 BCUP-5 0.188 found under Brazing Alloy Silver by American Welding Society Inc. The National Stock Number assigned to this part is 3439000771417, and the Federal Supply Class is 3439 Miscellaneous Welding Soldering And Brazing Supplies And Accessories. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AWSA5.8-81 BCUP-5 0.188.