Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 501-5754810 ITEM 20 found under Stud Welding by Erico Jones Co. The National Stock Number assigned to this part is 5307012449071, and the Federal Supply Class is 5307 Studs. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 501-5754810 ITEM 20.