Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TWOLB-4 found under Conduit Outlet by Killark Electric Mfg Co. The National Stock Number assigned to this part is 5975001410546, and the Federal Supply Class is 5975 Electrical Hardware And Supplies. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TWOLB-4.