S&S. M8 head bolt & stud kit, Black
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Description
Direct replacement for the stock head bolts and cylinder studs. Quality is much higher and recommended for performance builds. Complete kit.
Head bolts:
- Black oxide coated
- Heat treated 8640 steel
- 200.000 psi ultimate tensile strength
- 9/16" 12 point head with integral washer
- Formed threads
- Cold formed head
- Re-usable cylinder studs
- 4140 Chrome Moly
- Oil quenched and tempered to 39-44 HRC
- 180,000psi Tensile Strength
- Rounded thread roots, rather than flat, improving fatigue strength
- Positive stop shoulder allows for consistent installed height