Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1667 found under Ferrule Grooved Clamp Coupling by Abbatron Llc. The National Stock Number assigned to this part is 5340004187981, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1667.