Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SL6172-3-4 found under Stud Plain by Du Pont E I De Nemours And Co Inc. The National Stock Number assigned to this part is 5307012641435, 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 SL6172-3-4.