Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4550-632-SS-MODB .375 found under Stud Shouldered by R A F Electronic Hardware Inc. The National Stock Number assigned to this part is 5307014646227, 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 4550-632-SS-MODB .375.