SKU: 23126535103

Mr. Gasket Header Bolts - 3/8-16 x 3/4 Inch Hex Head - Set of 16 - 919G

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Ships within 48 hours · Estimated delivery Aug 14 - Aug 19

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Description

Mr. Gasket Header Bolts - 3/8-16 x 3/4 Inch Hex Head - Set of 16 - 919GOverview: Designed for make header installation easier and heat treated for extra strength. The special washer faced, smaller than standard hex head is for tight spaces. These bolts are grade 5 with a 7 16 inch hex head and a protective black finish, except where noted. Set of 16. 3 8 inch 16 x 3 4 inch. Features: 16 per Package Application: Year Make Model Submodel Engine Size Universal Specs: Brand Mr. Gasket Emission Code 5 Finish Black Oxide

Overview:

Designed for make header installation easier and heat-treated for extra strength. The special washer faced, smaller-than-standard hex head is for tight spaces. These bolts are grade 5 with a 7/16 inch hex head and a protective black finish, except where noted. Set of 16. 3/8 inch-16 x 3/4 inch.

Features:

  • 16 per Package

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Mr. Gasket
Emission Code 5
Finish Black Oxide
Material Steel
Product Type Header Bolts
Warning California Proposition 65
Warranty Limited 90 Day
Weight 0.63
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Exchange/Return Notes
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SKU: 23126535103

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4.9 ★★★★★
Based on 30 reviews
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Product Reviews
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Verified Purchase
Road Warrior Ray
Bozeman, US
★★★★★ 4
Excellent 11 hole jig
Size: 11 Holes
This jig worked excellently. It doesn't have any instructions, so I watched the video of it. I set it up the way the video showed, and I got decent results. Deducted a star since no instructions.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
J
Verified Purchase
Janis E White
Fort Morgan, US
★★★★★ 5
Perfect hole placement
Size: 11 Holes
Worked exactly as described.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 24, 2025
J
Verified Purchase
Jeffrey A Bradley
Lexington, US
★★★★★ 5
Good jig
Size: 11 Holes
The jig itself is great. The markings make it easy to be consistent; the design is well thought-out; and the build quality is good. I would recommend replacing the drill bit, though. A nice brad point will serve you better.
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Reviewed in the United States on December 5, 2025
W
Verified Purchase
WhiteTiger96
Whiting, US
★★★★★ 5
Great
Size: 11 Holes
Worked better than expected
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 10, 2026
M
Verified Purchase
Mark Danielson
Omaha, US
★★★★★ 2
In the trash after a single use
Size: 11 Holes
For context, I’m a seasoned woodworker and always evaluate tools with the price in mind. This seemed like a good deal and in fact when it arrived, it looked and felt like reasonable quality for the price. Unhappily, the first bookshelf I drilled was off from side to side by almost 3 mm which would make a really wobbly shelf situation. It took a while to figure out what was happening, but I finally realized the metal bushings that guide the drill bit are so soft that they cored out from contact with the bit even though I was cautious to not put the bit in under power but to get it in the bushing and aligned before drilling. Still, the bushings started angling immediately. So when you then use those angled bushings to set the pin for the next series, it’s off by a little bit. Then the next is off by a little more…. By the time I drilled holes up and down a 6’ high shelf, the bushings were out of square, the holes were 3 mm out of alignment, and the shelf sides were firewood. Back to the drawing board and this goes in the trash, I’m afraid.
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Reviewed in the United States on May 3, 2026

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