Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SPS W 39948 found under Washer Recessed by Abscoa Industries Inc. The National Stock Number assigned to this part is 5310012611913, and the Federal Supply Class is 5310 Nuts And Washers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SPS W 39948.