Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SM3 12 1 8 5 found under Insulation Sleeving Electrical by Sumitomo Electric Interconnect. The National Stock Number assigned to this part is 5970015774744, 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 SM3 12 1 8 5.