Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 703-1683 found under Screw Assembled Was by Northern Telecom Systems Corp. The National Stock Number assigned to this part is 5305009806134, 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 703-1683.