Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 516-0004-01 found under Screw Special by Allen R C Instruments Inc. The National Stock Number assigned to this part is 5305003227606, 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 516-0004-01.