Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E21672 found under Trap Steam by Spirax Sarco Inc. The National Stock Number assigned to this part is 4730002328024, 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 E21672.