Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WC4008-4-8 found under Screw Shoulder by West Coast Aerospace Inc. The National Stock Number assigned to this part is 5305010730954, 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 WC4008-4-8.