Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4AK87 found under Screw Tapping by W W Grainger Inc. The National Stock Number assigned to this part is 5305015605010, 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 4AK87.