Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SEELSKREW R-4-40X0.375 found under Screw Machine by Multi Flex Seals Inc. The National Stock Number assigned to this part is 5305014664685, 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 SEELSKREW R-4-40X0.375.