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Ships within 48 hours · Estimated delivery Jul 20 - Jul 25
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For Your Every Summer RSVP, with Code: SUMMER15
Description
Mr. Gasket Headlock Locking Header Bolts - M8-1.25 x 25mm - Set of 12 - 2235GOverview: 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. Features: 12 per Package Includes Ball Head Socket Tool to Start Header Bolt Into Head 410 stainless steel Minimum 180,000 PSI tensile strength 24 equally spaced clockwise teeth Application: Year Make
Overview:
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.
Features:
- 12 per Package
- Includes Ball Head Socket Tool - to Start Header Bolt Into Head
- 410 stainless steel
- Minimum 180,000 PSI tensile strength
- 24 equally spaced clockwise teeth
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 2009 - 2012 | Chevrolet | Colorado | 325/5.3 V8 | |
| 2003 - 2009 | Chevrolet | Express 2500 | 294/4.8 V8 | |
| 2006 - 2009 | Chevrolet | Express 3500 | 294/4.8 V8 | |
| 2003 - 2013 | Chevrolet | Silverado 1500 | 364/6 V8 | |
| 1999 - 2013 | Chevrolet | Silverado 1500 | 325/5.3 V8 | |
| 1999 - 2009 | GMC | Sierra 1500 | 294/4.8 V8 | |
| 2009 - 2012 | GMC | Canyon | 325/5.3 V8 | |
| 2006 - 2014 | GMC | Savana 3500 | 364/6 V8 | |
| 2003 - 2014 | GMC | Savana 2500 | 364/6 V8 | |
| 2003 - 2014 | Chevrolet | Express 2500 | 364/6 V8 | |
| 2006 - 2014 | Chevrolet | Express 3500 | 364/6 V8 | |
| 2001 - 2014 | GMC | Sierra 2500 HD | 364/6 V8 | |
| 1999 - 2013 | GMC | Sierra 1500 | 325/5.3 V8 | |
| 2001 - 2014 | Chevrolet | Silverado 2500 HD | 364/6 V8 | |
| 2007 - 2014 | GMC | Sierra 3500 HD | 364/6 V8 | |
| 2007 - 2014 | Chevrolet | Silverado 3500 HD | 364/6 V8 | |
| 2001 - 2013 | GMC | Sierra 1500 | 364/6 V8 | |
| 2009 - 2014 | GMC | Savana 4500 | 364/6 V8 | |
| 2003 - 2005 | Chevrolet | Express 2500 | 325/5.3 V8 | |
| 1997 - 2002 | Chevrolet | Express 1500 | 350/5.7 V8 | |
| 1997 - 2002 | Chevrolet | Express 1500 | 305/5 V8 | |
| 1997 - 2002 | Chevrolet | Express 2500 | 305/5 V8 | |
| 1997 - 2002 | Chevrolet | Express 2500 | 350/5.7 V8 | |
| 1997 - 2002 | Chevrolet | Express 3500 | 350/5.7 V8 | |
| 1997 - 1998 | Chevrolet | K1500 | 305/5 V8 | |
| 1997 - 1998 | Chevrolet | K1500 | 350/5.7 V8 | |
| 1999 | Chevrolet | K1500 | ||
| 1997 - 2000 | Chevrolet | K2500 | 350/5.7 V8 | |
| 1997 - 1998 | Chevrolet | K2500 | 305/5 V8 | |
| 1997 - 2000 | Chevrolet | K3500 | 350/5.7 V8 | |
| 1999 - 2009 | Chevrolet | Silverado 1500 | 294/4.8 V8 | |
| 2001 - 2006 | Chevrolet | Silverado 1500 HD | ||
| 1999 - 2004 | Chevrolet | Silverado 2500 | ||
| 2001 - 2006 | Chevrolet | Silverado 3500 | 364/6 V8 | |
| 1997 - 1998 | GMC | C1500 | 350/5.7 V8 | |
| 1997 - 1998 | GMC | C1500 | 305/5 V8 | |
| 1999 | GMC | C1500 | ||
| 1997 - 1998 | Chevrolet | C1500 | 350/5.7 V8 | |
| 1997 - 1998 | Chevrolet | C1500 | 305/5 V8 | |
| 1999 | Chevrolet | C1500 | ||
| 1997 - 1999 | Chevrolet | C2500 | 305/5 V8 | |
| 1997 - 2000 | Chevrolet | C2500 | 350/5.7 V8 | |
| 2007 | Chevrolet | Silverado 1500 Classic | 294/4.8 V8 | |
| 2009 - 2014 | Chevrolet | Express 4500 | 364/6 V8 | |
| 2007 | GMC | Sierra 1500 Classic | 294/4.8 V8 | |
| 2007 | GMC | Sierra 1500 Classic | 325/5.3 V8 | |
| 2007 | GMC | Sierra 2500 HD Classic | 364/6 V8 | |
| 2007 | GMC | Sierra 3500 Classic | 364/6 V8 | |
| 2007 | Chevrolet | Silverado 1500 Classic | 364/6 V8 | |
| 2007 | Chevrolet | Silverado 1500 Classic | 325/5.3 V8 | |
| 2007 | Chevrolet | Silverado 2500 HD Classic | 364/6 V8 | |
| 2007 | Chevrolet | Silverado 3500 Classic | 364/6 V8 | |
| 2007 | GMC | Sierra 1500 Classic | 364/6 V8 | |
| 2007 | Chevrolet | Silverado 1500 HD Classic | ||
| 2007 | GMC | Sierra 1500 HD Classic | ||
| 1997 - 2000 | Chevrolet | C3500 | 350/5.7 V8 | |
| 2003 - 2007 | Chevrolet | Express 1500 | 325/5.3 V8 | |
| 2003 - 2005 | Chevrolet | Express 3500 | ||
| 1997 - 2002 | GMC | Savana 1500 | 305/5 V8 | |
| 1997 - 2002 | GMC | Savana 2500 | 350/5.7 V8 | |
| 1997 - 2002 | GMC | Savana 2500 | 305/5 V8 | |
| 1997 - 2002 | GMC | Savana 3500 | 350/5.7 V8 | |
| 1999 | GMC | K1500 | ||
| 1997 - 1998 | GMC | K1500 | 350/5.7 V8 | |
| 1997 - 1998 | GMC | K1500 | 305/5 V8 | |
| 1998 | GMC | K2500 | 305/5 V8 | |
| 1997 - 2000 | GMC | K2500 | 350/5.7 V8 | |
| 1997 - 2000 | GMC | K3500 | 350/5.7 V8 | |
| 1997 - 2002 | GMC | Savana 1500 | 350/5.7 V8 | |
| 2003 - 2007 | GMC | Savana 1500 | 325/5.3 V8 | |
| 2003 - 2009 | GMC | Savana 2500 | 294/4.8 V8 | |
| 2003 - 2005 | GMC | Savana 2500 | 325/5.3 V8 | |
| 2003 - 2005 | GMC | Savana 3500 | ||
| 2001 - 2006 | GMC | Sierra 1500 HD | ||
| 1999 - 2004 | GMC | Sierra 2500 | ||
| 2001 - 2006 | GMC | Sierra 3500 | 364/6 V8 | |
| 2005 - 2008 | Hummer | H2 | ||
| 2007 - 2008 | GMC | Sierra 1500 | 376/6.2 V8 | |
| 2006 - 2009 | GMC | Savana 3500 | 294/4.8 V8 | |
| 2008 - 2009 | Pontiac | G8 | 364/6 V8 | |
| 2009 - 2010 | Hummer | H3T | 325/5.3 V8 | |
| 1997 - 2000 | GMC | C2500 | 350/5.7 V8 | |
| 1997 - 1998 | GMC | C2500 | 305/5 V8 | |
| 1997 - 2000 | GMC | C3500 | 350/5.7 V8 |
Specs:
| Brand | Mr. Gasket |
|---|---|
| Emission Code | 5 |
| Finish | Polished |
| Material | 410 stainless steel |
| Product Type | HeadLock Locking Header Bolts |
| Warning | California Proposition 65 |
| Warranty | Limited 90 Day |
| Weight | 5 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.4 ★★★★★
Based on 8 reviews
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Product Reviews
★★★★★ 4
SO very comfortable and supportive, but can't get the four hooks hooked in the back.
Color: Light Beige, Size: 44DD
I measured myself as described in listing and ordered 44dd based on that. The bra fits just right. It is super smooth and soft fabric and VERY comfortable! I especially like that it holds in the side boobs and the underwire does not poke out. I don't think I have ever had a bra before that actually stayed up on the sides! Maybe I have been wearing the wrong size?? I was skeptical and bought because of the free returns, but I am keep this one and one other style which is just as comfortable. THE ONLY THING WRONG AND THEREFORE 4 STARS is that I cannot hook the backs (4 hooks). The other one I bought was doable but with effort, this on I absolutely could not do and had to hook in the front and slide around. I don't know if there a fix for this but I will keep them because they are so dang comfy and supportive. And yes, they do minimize which is also wonderful for me!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 17, 2025
★★★★★ 5
Fits like a $100 bra
Color: Black, Size: 36H
I don’t know why HSIA bras are so comfortable. The underwire does not dig in. This is the third one I’ve purchased. This bra has a pretty lace pattern. I love it. Highly recommend.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Great bra!
Color: Dark Beige, Size: 38D
I have several different bras from this brand. This is a really good minimizer. It has a nice wide strap. I don’t love the clasp as it is covered in a hard material, but overall it is a good bra that you can wear all day under form fitting shirts.
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Reviewed in the United States on May 11, 2026
★★★★★ 1
Uncomfortable
Color: Light Beige, Size: 38DD
In my search for a comfortable well-fitting bra, I came across this one. Reviews were good, so I ordered one. Half way through the day, I had to take it off. This is the most uncomfortable bra ever. This one went on to the "uncomfortable pile" pretty quick
Not full coverage and not supportive. Side coverage is pretty good but straps are thin and do not lift.
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Reviewed in the United States on March 25, 2026
★★★★★ 5
Best Bra for Top Heavy Girlies!
Color: Light Beige, Size: 40C
I tried HSIA in the past but non of the bras fit right but this bra is the best! I’m glad I gave HSIA another chance because this is the best bra I’ve ever had! I’m already top heavy and doesn’t add extra bulk. It’s comfortable and breathable. In top of all that it’s affordable!
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Reviewed in the United States on April 25, 2026