Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 255520 found under Lock Assembly by American Safety Razor Co. The National Stock Number assigned to this part is 1660009748243, and the Federal Supply Class is 1660 Aircraft Air Conditioning Heating And Pressurizing Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 255520.