Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 387-3560-3 found under Bolt Machine by W Machine Works Inc. The National Stock Number assigned to this part is 5306012173100, 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 387-3560-3.