Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B21429 ITEM 13 found under Cam Assembly Contro by O E M Controls Inc. The National Stock Number assigned to this part is 3040016135904, and the Federal Supply Class is 3040 Miscellaneous Power Transmission Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B21429 ITEM 13.