Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 10-857139 found under Screwcaphexagon Head by Marine Power International Pty Ltd. The National Stock Number assigned to this part is 5305016889004, 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 10-857139.