Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4112U109 found under Gasket Set by Blaw Knox Corp. The National Stock Number assigned to this part is 5330000300887, 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 4112U109.