Wedge-Locking Header Bolts Hex Head 3/8 Diameter X 3/4 Inch Black Oxide 12 Pcs Proform Ignition Coil Wiring Harness Repair Kit For Vise or Arbor Use

For Vise or Arbor Use

One Measures 4 to 5 Inch Range In

Pontiac 1979 and earlier

New features include full size 15 inch x 15 inch slim aluminum scale pads

2-Piece Design

Wedge-Locking Header Bolts Hex Head 3/8 Diameter X 3/4 Inch Black Oxide 12 Pcs Proform Ignition Coil Wiring Harness Repair Kit For Vise or Arbor UseEach 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