Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HL61-6-27 found under Pin Rivet by Tab Engineering. The National Stock Number assigned to this part is 5320010428898, and the Federal Supply Class is 5320 Rivets. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HL61-6-27.