Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number SI 412 found under Plug Protective Dus by Niagara Plastics Llc. The National Stock Number assigned to this part is 5340013500397, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like SI 412.