Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 51B464-4-6 found under Bolt Machine by J M Precision Inc. The National Stock Number assigned to this part is 5306008027159, 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 51B464-4-6.