Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PBF1253-4-32 found under Bolt Close Tolerance by Sps Technologies Inc. The National Stock Number assigned to this part is 5306011193150, and the Federal Supply Class is 5306 Bolts. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PBF1253-4-32.