Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R91GA420 found under Standoff Threaded S by Monogram Aerospace Fasteners Inc. The National Stock Number assigned to this part is 5340012464106, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like R91GA420.