Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 493-01 found under Dummy Plug Telephon by Switchcraft Inc. The National Stock Number assigned to this part is 5935008609551, 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 493-01.