ARP 135-2501 Hardened Balancer Bolt Kit for Chevrolet Big Block 396 427 454 502 Engines
Thread Size: 1/2-20 in. RH
Underhead Length (in): 1.550 in.
Head Style: 12-point
Washer Included: Yes
Fastener Yield Strength (psi): 200,000 psi
Fastener Material: Chromoly
Fastener Finish: Black oxideAs the crankshaft flexes, the damper absorbs incredible amounts of energy. These damper bolt kits from ARP will ensure that your balancer is locked into position. They feature a 1/4 in. thick wide-area washer and an extra-tall, 12-point head that accepts a deep socket to eliminate the fear of stripping the head.
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