Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SK-0038 POSITION 21 found under Ring Retaining by Ships Machinery International Inc. The National Stock Number assigned to this part is 5325013386695, and the Federal Supply Class is 5325 Fastening Devices. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SK-0038 POSITION 21.