Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A68131-4 found under Screw Assembled Washer by Vdo Control Systems Inc. The National Stock Number assigned to this part is 5305001775702, 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 A68131-4.