Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PF50-440-1CN found under Fastener Positive Lock by Penn Engineering And Manufacturing. The National Stock Number assigned to this part is 5325016100465, 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 PF50-440-1CN.