Harmonic Balancer Bolt, 12-Point Black Oxide O-Rings & Seals 2618-T61 is the material that

2618-T61 is the material that is used when fatigue resistance and durability are of prime importance by all premium racing piston manufacturers

Part Number: MSD84319

3x AN-8 ORB

515" UHL (14-Pack)

Harmonic Balancer Bolt, 12-Point Black Oxide O-Rings & Seals 2618-T61 is the material thatfits BB Chev 1 2 20 Thread x 1. 550" UHL, 5 8" Socket Part Number : AR135 2501 As The Crankshaft Flexes And Twists, The Balancer Absorbs Incredible Amounts Of Kinetic Energy. To Ensure That The Balancer Is Locked In Position Arp Has Developed These Ultra Strong 200,000 Psi Bolts That Let You Exert Maximum Clamping Force. Special Features Include 1 4 Thick, Wide Area Washer And An Extra Tall 12 point Head That Accepts A Deep Socket And Aliminates The