Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D1231 28 2 found under Stud Plain by Hamworthy Belliss And Morcom Ltd. The National Stock Number assigned to this part is 5307991085573, 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 D1231 28 2.