Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 175B3977P1 found under Bolt Eye by Kapl Inc. The National Stock Number assigned to this part is 5306013842695, 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 175B3977P1.