Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number LD167991PC2 found under Gear Spur by Obrien Gear Co. The National Stock Number assigned to this part is 3020001771260, and the Federal Supply Class is 3020 Gear Pulley Sprocket And Transmission Chain. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like LD167991PC2.