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Mr. Gasket Headlock Locking Header Bolts - 3/8-16 x 3/4 Inch - Set of 16

Fits Chevrolet Big Block 396-454, Ford 289-351W, 426 Hemi, Ford 429/460

PART# 2231G

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$46.76   Suggested Retail
$37.87   Holleydays Price
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Headlock™ Bolts eliminate the need for lock washers, Period. That's because each Headlock™ Bolt features 24 equally-spaced, stainless steel teeth serrations that bite into and hold onto the attaching surface-eliminating the need for lock-washers.


  • 16 per Package
  • Includes a ball-head/hex-key socket-installation tool that makes it easy to get them started
  • 410 stainless steel
  • Minimum 180,000 PSI tensile strength
  • 24 equally spaced clockwise teeth


BrandMr. Gasket
Emission Code5
Material410 stainless steel
Product TypeHeadLock Locking Header Bolts
WarrantyLimited 90 Day
Part Number2231G



This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

Warranty Information

Limited 90 Day: See Details


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         X  Holleydays 2020 20% off and DD
         X  Holleydays 2020 20% off and DD