Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A61-139-3 found under Pin Straight Headle by Drs Power And Control Technologies. The National Stock Number assigned to this part is 5315011948915, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like A61-139-3.