Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R63870B11E8385 found under Receptacle Turnlock Fastener by Unifab Industries Inc. The National Stock Number assigned to this part is 5325000679222, 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 R63870B11E8385.