Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 504 028 1 SMA found under Connector Splice by Amp Llc. The National Stock Number assigned to this part is 5935014621638, and the Federal Supply Class is 5935 Connectors Electrical. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 504 028 1 SMA.