Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number PHD300N-1A found under by Bridgeport Fabricators Inc. The National Stock Number assigned to this part is 5640003928675, and the Federal Supply Class is 5640 Wallboard Building Paper And Thermal Insulation Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like PHD300N-1A.