Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PMH23 found under Packing Assembly Ki by Rolls Royce Marine As Avd Norwinch. The National Stock Number assigned to this part is 5330251508285, and the Federal Supply Class is 5330 Packing And Gasket Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PMH23.