This is the pivot pin kit that connects the crossbar to the inner boom on Century Heavy Duty Wreckers. Century 5030, 5130, 5230, 7035, 9055 and SDU underlifts with the 5" x 5" crossbar. Includes (1) 0710051Top Pivot Pin, (1) 0710052 Bottom Pivot Pin, (1) 0303088 Pivot Pin Bushing, (1) 0301822 Pivot Pin O-Ring, (2) 0303097 1/8" Thrust Washers, (2) 0303098 1/16" Thrust Washers, (2) 0400271 Pivot Pin Bolts, (2) 0400508 Lock Washers.