Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 813 1 INCH found under Trap Steam by Armstrong International Inc. The National Stock Number assigned to this part is 4730010716605, and the Federal Supply Class is 4730 Hose Pipe Tube Lubrication And Railing Fittings. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 813 1 INCH.