Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 845-2110234 PC21 found under Ring Packing Prefor by Johns Manville Corp. The National Stock Number assigned to this part is 5330011120443, 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 845-2110234 PC21.