Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 490 181 00 found under Screw Allen by Hatz Diesel Of America Inc. The National Stock Number assigned to this part is 5305012646232, 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 490 181 00.