Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 743B126 found under Spring Helical Extension by Oeco Llc. The National Stock Number assigned to this part is 5360004187042, and the Federal Supply Class is 5360 Coil Flat Leaf And Wire Springs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 743B126.