Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number CSRT 12-12U-S316 found under Tee Tube To Boss by Hy Lok Usa Inc. The National Stock Number assigned to this part is 4730015776178, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like CSRT 12-12U-S316.