Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number A-5-3A0F3 AND B-6-0A0A8 found under Seat Ring And Plug by Hammel Dahl Inc. The National Stock Number assigned to this part is 4820011200455, 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 A-5-3A0F3 AND B-6-0A0A8.