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Proform Wedge-Locking Header Bolts Hex Head 3/8 dia. X 3/4in Black Oxide 12 Pcs 66751

Exhaust Header Bolt

66751

California Residents: Prop 65 Warning

WARNING: Cancer and Reproductive Harm

Pricing: $31.95
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Description

  • Each PROFORM Grade 8 Header Bolt is permanently assembled with a pair of special washers.
Each PROFORM Grade 8 Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft-lbs, the washers super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self-locked in this manner, any bolt-loosening rotation is blocked by a wedge-locking action created by the washers interfacing, matching cams. Its an uphill climb: vibration that might ordinarily loosen the bolt actually increases the wedge-locking tension, securing the bolt even more. Because this simple wedge-locking method uses tension instead of friction, contact with oil actually facilitates the wedge effect. When changing headers, PROFORM Header Bolts can be untightened with a normal wrench, lubricated, and reused.

Details

  • 66751
  • 66751
  • Proform
  • New

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Shipping Information

  • Item Requires Shipping
  • W4.5000” x H1.7500” x L6.7500”