Proform 3/8 x 1" Wedge Locking Header Bolt, Pack Of 12 #66753 View larger
     Proform 3/8 x 1" Wedge Locking Header Bolt, Pack Of 12 #66753

Proform 3/8 x 1" Wedge Locking Header Bolt, Pack Of 12 #66753

Buy Proform 3/8 x 1" Wedge Locking Header Bolt, Pack Of 12 #66753, Model PPI_PR66753 online. Automotive,Performance

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Proform 3/8 x 1" Wedge Locking Header Bolt, Pack Of 12 #66753

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. It’s 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.


Features:




  • Grade 8 (12.9) Steel

  • Hex Head Type

  • 1-inch Length

  • Fits GM V6, SB 265-400, Buick, Olds, Pontiac '79 and earlier, Mopar BB 383-440 exc 413, AMC V8's w 3/8" bolts

  • Sold as Set of 12


Specifications :


Brand: Proform Parts


Manufacturer's Part Number: 66753


Part Type: Header Fasteners


Product Line: Proform Self-Locking Wedge Header Bolts


Fastener Style: Bolt


Thread Size: 3/8 in.-16


Head Style: Hex


Underhead Length (in.): 1.000 in.


Fastener Material: Steel


Fastener Color: Black oxide


Quantity: Sold as a set of 12.

Description

Product code: Proform 3/8 x 1" Wedge Locking Header Bolt, Pack Of 12 #66753
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