Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number JHP13-273 found under Cock Plug by Hollingsworth John R Co. The National Stock Number assigned to this part is 4820002893151, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like JHP13-273.