Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 40955-20 found under Screw Externally Relieved Body by R A F Electronic Hardware Inc. The National Stock Number assigned to this part is 5305001232574, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 40955-20.