Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 137OAS501-6 found under Fastener Slide Interlocking by Switlik Parachute Company Inc. The National Stock Number assigned to this part is 5325012665865, 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 137OAS501-6.