Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 1550 found under Cord Fibrous by Air Lock Incorporated. The National Stock Number assigned to this part is 4020013626955, and the Federal Supply Class is 4020 Fiber Rope Cordage And Twine. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 1550.