Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4D13988 found under Stud Shouldered by Fwd Seagrave Holdings Lp Div Sea. The National Stock Number assigned to this part is 5307006370856, 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 4D13988.