Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BS18303 found under Stud Snap Fastener by Trw Inc. The National Stock Number assigned to this part is 5325002764908, 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 BS18303.