Each PROFORM Grade 8 Collector Bolt and Nut combo is permanently assembled with two pairs special locking washers. When the combo is tightened, the washers super-hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the flange. 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. PROFORM Collector Bolts can be untightened with a normal wrench, lubricated, and reused.
  • Wedge-Locking Collector Bolts and Nuts
  • 3/8 dia. X 1.25in
  • Black Finish
  • 6 Pcs
Category Collector Bolts
Color Black Oxide
Country of Origin (Primary) TW
Emission Code Legal US
Feature/Benefit Reusable
Finish Black Oxide
Harmonized Tariff Code (Schedule B) 7318159000
Hazardous Material Code N
Life Cycle Status Code 2
Material Steel
NAFTA Preference Criterion Code B
Part Type Collector Bolts
SDR Required Flag N

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PROFORM 66757 Wedge-Locking Exhaust Collector Bolts, 6 Pieces

Product Information

  • Brand: Proform
  • Product Number: 66757
  • $24.99