Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BUWEPSDWG2171842 found under Tab Primer Shield by Pyramid Machine Corp. The National Stock Number assigned to this part is 1398004358080, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BUWEPSDWG2171842.