SKU: 31817550621

Mr. Gasket Header Bolts - 3/8-16 x 3/4 Inch Hex & Socket Head -Black Oxide 3420G

Sale price$10.70 Regular price$11.89
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 26 - Jul 31

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Description

Mr. Gasket Header Bolts - 3/8-16 x 3/4 Inch Hex & Socket Head -Black Oxide 3420GOverview: When installing headers you will need header bolts, factory exhaust manifold bolts won't work. These Mr. Gasket Header Bolts are Grade 5 for strength, black oxide coated, and have a hex head that is ideal for use where space is minimal your typical header flanges. Ever had a set of headers where a socket just seemed it wouldn't fit? These bolts also have a socket head or Allen key drive in the center for just that problem. Sold as a set of

Overview:

When installing headers you will need header bolts, factory exhaust manifold bolts won't work. These Mr. Gasket Header Bolts are Grade 5 for strength, black oxide coated, and have a hex head that is ideal for use where space is minimal - your typical header flanges. Ever had a set of headers where a socket just seemed it wouldn't fit? These bolts also have a socket head or Allen key drive in the center for just that problem. Sold as a set of 12 Fits: AMC 290-401 Chevrolet Small Block 262-400 Chrysler Big Block 383-440 (Does not Fit 426 Hemi) Pontiac 326-455 Oldsmobile 330-455

Features:

  • Made From High Strength Steel
  • Corrosion Resistant Black Coating
  • Has Both Socket And Hex Heads For Ease Of Use
  • 12 per Package

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Mr. Gasket
Color Black
Emission Code 5
Finish Black Oxide
Material Steel
Product Type Header Bolts
Warning California Proposition 65
Warranty Limited 1 Year Warranty
Weight 0.56
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 31817550621

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Gabriel Paz
New York, US
★★★★★ 5
Well, worth it
Well worth it my robot vacuum stopped working properly. It would not find it’s station and would wonder until the battery died. I was able to get a refund and buy a replacement.
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Reviewed in the United States on January 12, 2026
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Verified Purchase
Gerald J.
Bozeman, US
★★★★★ 5
Fast and no hassle protection of your expensive product purchases
Had an issue with my expensive floor cleaning robot breaking after less than 2 years (i.e. 1 year in to this 3 year extended protection plan). After submitting an online claim, they sent me a 1 page form to fill-out and provided a shipping label to return the large and heavy robot. Within 3 days, they sent me an email saying they couldn't repair it and provided a FULL-REFUND via an Amazon gift card # which successfully credited to my Amazon account.
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Reviewed in the United States on January 4, 2026
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Verified Purchase
Y. Sze
Draper, US
★★★★★ 5
Refunded unrepairable roborock
great way to protect any purchases. RoboRock was unrepairable by Asurion service center and refunded the amount.
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Reviewed in the United States on May 29, 2026
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Verified Purchase
P. Adams
Lowell, US
★★★★★ 1
HORRIBLE CUSTOMER SERVICE!
Bought 3 year warranty for new Dyson vacuum for $76. On day 2 the battery for vacuum would not lock into place. In order to have a functioning vacuum as quickly as possible, I purchased a second battery from Amazon. That resolved the problem, proving the battery was the problem, not the vacuum. I filed a claim with Assurion, which included sending photos, receipts, etc. The claim was still "processing" for a week. I got on a chat with Assurion, and for nearly an hour I tried to explain why it was unnecessary for me to return the whole vacuum. I asked for a supervisor, but they advised me to call because no supervisor was available. I called, and after finally getting through the computer system, I got the same run around. Finally a supervisor came on the line to tell me that this was actually an Amazon or a Dyson problem, and that I would need to return the entire vacuum. Also they would not "reimburse" for the battery I purchased. I never wanted reimbursement, I only wanted a functional battery - which is what I paid for. The supervisor told me I could "contact" Amazon. Everyone knows there is no human to contact at Amazon. You can keep the product, or you can return the product. As previously stated, I do not want to return the vacuum. Finally, the supervisor connected my call to Dyson. They refused to help me because I purchased the vacuum through Amazon. After two wasted hours, I ended up just where I suspected I would...without any help at all. I am going to try to "return" the useless Assurion warranty.
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Reviewed in the United States on February 18, 2025
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Mohamed Said
Louisville, US
★★★★★ 5
Great service, no hassles
Great service. I'm now buying their protection with every valuable purchase. Keep up the good work.
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Reviewed in the United States on May 3, 2026

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