Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number C-FRAME-B-3688-90 found under Boom Hoisting Marine by Mcelroy Marine Machinery. The National Stock Number assigned to this part is 2020013627213, and the Federal Supply Class is 2020 Rigging And Rigging Gear. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like C-FRAME-B-3688-90.