Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number T42-100FR found under Insulation Sleeving Electrical S by Sigmaform Corp. The National Stock Number assigned to this part is 5970010511959, and the Federal Supply Class is 5970 Electrical Insulators And Insulating Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like T42-100FR.