SKU: 56700605883

Mr. Gasket Headlock Locking Header Bolts - 3/8-16 x 3/4 Inch - Set of 16 - 2231G

$54.62 $60.69
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Ships within 48 hours · Estimated delivery Aug 11 - Aug 16

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Description

Mr. Gasket Headlock Locking Header Bolts - 3/8-16 x 3/4 Inch - Set of 16 - 2231GOverview: 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: 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

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:

  • 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

Application:

Year Make Model Submodel Engine Size
1973 - 1974 GMC C35/C3500 Pickup 454/7.4 V8
1968 - 1969 GMC K15/K1500 Pickup 396/6.5 V8
1968 - 1969 GMC K25/K2500 Pickup 396/6.5 V8
1973 - 1974 GMC K25/K2500 Pickup 454/7.4 V8
1968 - 1969 GMC K35/K3500 Pickup 396/6.5 V8
1970 - 1971 GMC K35/K3500 Pickup 402/6.6 V8
1973 - 1974 GMC K35/K3500 Pickup 454/7.4 V8
1967 Mercury Brougham 428/7 V8
1966 - 1967 Mercury Colony Park 410/6.7 V8
1966 - 1968 Mercury Colony Park 428/7 V8
1965 - 1967 Mercury Colony Park 427/7 V8
1967 Mercury Brougham 410/6.7 V8
1967 Mercury Brougham 427/7 V8
1965 Mercury Caliente 427/7 V8
1966 - 1967 Mercury Commuter 410/6.7 V8
1966 - 1968 Mercury Commuter 428/7 V8
1968 Mercury Cougar 427/7 V8
1970 - 1971 Mercury Cougar 429/7 V8
1968 - 1970 Mercury Cougar 428/7 V8
1965 - 1967 Mercury Comet 427/7 V8
1965 - 1968 Mercury Cyclone 427/7 V8
1968 - 1969 Mercury Cyclone 428/7 V8
1965 - 1967 Mercury Commuter 427/7 V8
1969 Mercury Cougar 302/5 V8
1965 Mercury Marauder 427/7 V8
1967 Mercury Marquis 410/6.7 V8
1967 - 1969 Mercury Marquis 428/7 V8
1966 - 1967 Mercury Montclair 410/6.7 V8
1965 - 1967 Mercury Montclair 427/7 V8
1968 - 1969 Mercury Montego 428/7 V8
1968 Mercury Montego 427/7 V8
1970 - 1971 Mercury Cyclone 429/7 V8
1967 Mercury Marquis 427/7 V8
1966 - 1968 Mercury Montclair 428/7 V8
1965 - 1967 Mercury Monterey 427/7 V8
1966 - 1970 Mercury Monterey 428/7 V8
1970 Mercury Montego 429/7 V8
1966 - 1967 Mercury Park Lane 410/6.7 V8
1966 - 1968 Mercury Park Lane 428/7 V8
1966 - 1967 Mercury Monterey 410/6.7 V8
1965 - 1967 Mercury Park Lane 427/7 V8
1965 Mercury Villager 427/7 V8
1965 - 1968 Ford Custom 500 427/7 V8
1965 - 1968 Ford Galaxie 500 427/7 V8
1966 - 1970 Ford Custom 500 428/7 V8
1969 - 1970 Chevrolet Nova 396/6.5 V8
1961 Chevrolet Brookwood 409/6.7 V8
1961 Chevrolet Kingswood 409/6.7 V8
1961 Chevrolet Nomad 409/6.7 V8
1961 Chevrolet Parkwood 409/6.7 V8
1963 Ford 300 427/7 V8
1966 Ford Custom 427/7 V8
1968 - 1970 Ford Custom 428/7 V8
1969 Chevrolet Estate 396/6.5 V8
1969 Chevrolet Estate 427/7 V8
1970 Chevrolet Estate 454/7.4 V8
1970 Chevrolet Estate 402/6.6 V8
1969 Chevrolet Brookwood 427/7 V8
1970 - 1972 Chevrolet Brookwood 454/7.4 V8
1970 - 1972 Chevrolet Brookwood 402/6.6 V8
1968 - 1969 Chevrolet C10 Pickup 396/6.5 V8
1970 - 1972 Chevrolet C10 Pickup 402/6.6 V8
1973 - 1974 Chevrolet C10 Pickup 454/7.4 V8
1968 - 1969 Chevrolet C20 Pickup 396/6.5 V8
1970 - 1972 Chevrolet C20 Pickup 402/6.6 V8
1973 - 1974 Chevrolet C20 Pickup 454/7.4 V8
1968 - 1969 Chevrolet C30 Pickup 396/6.5 V8
1970 - 1972 Chevrolet C30 Pickup 402/6.6 V8
1973 - 1974 Chevrolet C30 Pickup 454/7.4 V8
1967 - 1969 Chevrolet Camaro 396/6.5 V8
1969 Chevrolet Camaro 427/7 V8
1970 - 1972 Chevrolet Camaro 402/6.6 V8
1966 - 1969 Chevrolet Caprice 396/6.5 V8
1966 - 1969 Chevrolet Caprice 427/7 V8
1970 - 1976 Chevrolet Caprice 454/7.4 V8
1970 - 1972 Chevrolet Caprice 402/6.6 V8
1965 - 1970 Chevrolet Chevelle 396/6.5 V8
1970 - 1973 Chevrolet Chevelle 454/7.4 V8
1970 - 1972 Chevrolet Chevelle 402/6.6 V8
1968 Chevrolet Chevy II 396/6.5 V8
1966 - 1969 Chevrolet Corvette 427/7 V8
1965 Chevrolet Corvette 396/6.5 V8
1970 - 1974 Chevrolet Corvette 454/7.4 V8
1975 - 1980 Chevrolet C10 454/7.4 V8
1975 - 1986 Chevrolet C20 454/7.4 V8
1975 - 1986 Chevrolet C30 454/7.4 V8
1976 Chevrolet G20 454/7.4 V8
1975 - 1976 Chevrolet G30 454/7.4 V8
1970 - 1976 Chevrolet Impala 454/7.4 V8
1976 - 1980 Chevrolet K10 454/7.4 V8
1976 - 1978 Chevrolet K20 454/7.4 V8
1977 - 1986 Chevrolet K30 454/7.4 V8
1973 - 1975 Chevrolet Laguna 454/7.4 V8
1973 - 1975 Chevrolet Malibu 454/7.4 V8
1970 - 1975 Chevrolet Monte Carlo 454/7.4 V8
1987 - 1988 Chevrolet R30 454/7.4 V8
1989 Chevrolet R3500 454/7.4 V8
1987 - 1988 Chevrolet V30 454/7.4 V8
1989 Chevrolet V3500 454/7.4 V8
1975 - 1978 GMC C15 454/7.4 V8
1979 - 1980 GMC C1500 454/7.4 V8
1975 - 1978 GMC C25 454/7.4 V8
1979 - 1986 GMC C2500 454/7.4 V8
1968 - 1970 Ford Mustang 428/7 V8
1971 - 1972 Ford Mustang 351/5.8 V8
1964 - 1967 Ford Ranch Wagon 427/7 V8
1968 - 1970 Ford Ranch Wagon 428/7 V8
1963 - 1967 Ford Thunderbird 427/7 V8
1968 Ford Torino 427/7 V8
1970 - 1971 Ford Torino 429/7 V8
1963 Ford Thunderbird 410/6.7 V8
1966 - 1967 Ford Thunderbird 428/7 V8
1968 - 1969 Ford Torino 428/7 V8
1968 - 1969 GMC C15/C1500 Pickup 396/6.5 V8
1970 - 1972 GMC C15/C1500 Pickup 402/6.6 V8
1973 - 1974 GMC C15/C1500 Pickup 454/7.4 V8
1968 - 1969 GMC C25/C2500 Pickup 396/6.5 V8
1970 - 1972 GMC C25/C2500 Pickup 402/6.6 V8
1973 - 1974 GMC C25/C2500 Pickup 454/7.4 V8
1968 - 1969 GMC C35/C3500 Pickup 396/6.5 V8
1970 - 1972 GMC C35/C3500 Pickup 402/6.6 V8
1970 - 1972 Chevrolet Townsman 454/7.4 V8
1969 Chevrolet Townsman 396/6.5 V8
1969 Chevrolet Townsman 427/7 V8
1968 - 1970 Ford Country Sedan 428/7 V8
1964 - 1966 Ford Country Sedan 427/7 V8
1964 - 1968 Ford Country Squire 427/7 V8
1971 - 1972 Ford Country Sedan 429/7 V8
1967 - 1969 Ford Country Squire 428/7 V8
1964 - 1969 Ford Fairlane 427/7 V8
1968 - 1969 Ford Fairlane 428/7 V8
1970 Ford Fairlane 429/7 V8
1965 - 1967 Ford Galaxie 427/7 V8
1968 - 1969 Ford Galaxie 500 428/7 V8
1970 Ford Falcon 429/7 V8
1966 - 1967 Ford Galaxie 428/7 V8
1965 - 1969 Ford LTD 428/7 V8
1965 - 1968 Ford LTD 427/7 V8
1969 - 1971 Ford Mustang 429/7 V8
1968 Ford Mustang 427/7 V8
1975 - 1978 GMC C35 454/7.4 V8
1979 - 1986 GMC C3500 454/7.4 V8
1975 - 1976 GMC G25 454/7.4 V8
1976 GMC G35 454/7.4 V8
1976 GMC K15 454/7.4 V8
1980 GMC K1500 454/7.4 V8
1976 - 1978 GMC K25 454/7.4 V8
1979 - 1986 GMC K3500 454/7.4 V8
1987 - 1989 GMC R3500 454/7.4 V8
1987 - 1989 GMC V3500 454/7.4 V8
1961 - 1965 Chevrolet Bel Air 409/6.7 V8
1963 - 1969 Chevrolet Bel Air 427/7 V8
1965 - 1969 Chevrolet Bel Air 396/6.5 V8
1970 - 1975 Chevrolet Bel Air 454/7.4 V8
1970 - 1972 Chevrolet Bel Air 402/6.6 V8
1961 - 1965 Chevrolet Biscayne 409/6.7 V8
1963 - 1969 Chevrolet Biscayne 427/7 V8
1965 - 1969 Chevrolet Biscayne 396/6.5 V8
1973 - 1974 Chevrolet G10 Van 454/7.4 V8
1973 - 1974 Chevrolet G20 Van 454/7.4 V8
1973 - 1974 Chevrolet G30 Van 454/7.4 V8
1961 - 1965 Chevrolet Impala 409/6.7 V8
1963 - 1969 Chevrolet Impala 427/7 V8
1965 - 1969 Chevrolet Impala 396/6.5 V8
1970 - 1972 Chevrolet Impala 402/6.6 V8
1968 - 1969 Chevrolet K10 Pickup 396/6.5 V8
1970 - 1972 Chevrolet K10 Pickup 402/6.6 V8
1973 - 1974 Chevrolet K10 Pickup 454/7.4 V8
1968 - 1969 Chevrolet K20 Pickup 396/6.5 V8
1970 - 1972 Chevrolet K20 Pickup 402/6.6 V8
1973 - 1974 Chevrolet K20 Pickup 454/7.4 V8
1968 - 1969 Chevrolet K30 Pickup 396/6.5 V8
1970 - 1972 Chevrolet K30 Pickup 402/6.6 V8
1973 - 1974 Chevrolet K30 Pickup 454/7.4 V8
1969 Chevrolet Kingswood 396/6.5 V8
1969 Chevrolet Kingswood 427/7 V8
1970 - 1972 Chevrolet Kingswood 454/7.4 V8
1970 - 1972 Chevrolet Kingswood 402/6.6 V8
1965 - 1967 Chevrolet Malibu 396/6.5 V8
1970 - 1972 Chevrolet Monte Carlo 402/6.6 V8
1970 Chevrolet Nova 402/6.6 V8
1970 - 1972 Chevrolet Townsman 402/6.6 V8
1970 - 1972 Chevrolet Biscayne 454/7.4 V8
1969 Chevrolet Brookwood 396/6.5 V8
1970 - 1972 Chevrolet Biscayne 402/6.6 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 7
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: 56700605883

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4.8 ★★★★★
Based on 21 reviews
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Product Reviews
J
Verified Purchase
Jenny J
Houston, US
★★★★★ 5
My Puppy Loves this Indestructible Dragon
Size: Large, Color: Pink, Size: Large, Color: Pink
My puppy (8 month old black lab mix) loves, loves, loves her dragon. She has had it for 2 months now. It is one of her favorites and gets daily rough play time. It's her go-to toy for fetch and tug games, as well as just general mouthy play. The squeaker gave out after about 4 weeks, but she would binge squeak for prolonged periods (kind of like chomping on gum) so it was almost a blessing when it went silent. She still chomps on it, but at least now I don't have to hear it. Other than the fact that it's a little grungy and bedraggled from so much loving, it is still in amazing shape. The seams and fur are all still intact. There are no visible holes, rips, or weak spots. I love Chew Guard Technology. This dragon replaced her goDog Iguana (from PetSmart) that developed a tear in the fur after about 4 months of heavy use. (It was superficial, just the outer fur layer and not the innards, but we disposed of it before she could eat more fur.) She can be pretty rough on her toys and I can never predict if any given toy will last minutes or months. The goDog stuffies definitely fall into the "months" category, even with rough daily use. Edit: The dragon lasted about 6 months of intensive, hard play before it developed a small tear in the fur. I patched it a couple times, but once my pup discovers a weak spot, it's the kiss of death for any stuffed item. We had to dispose of the dragon (so sad) to keep her from eating any more of the fur. We replaced the dragon with the goDog Chameleon, which is still going strong. I think we will go back to the dragon for our next toy because it's just so darned cute. We gave the dragon to my niece for her golden retriever puppy who is very chew-happy. That dragon is also doing well. You've just gotta love that chew-guard technology. This is one tough toy.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 26, 2015
M
Verified Purchase
Mother of two
Alexandria, US
★★★★★ 5
Precious toy for big dogs too
Size: Large, Color: Skinny Green
Not only is this toy cute and fun, but material is thick and durable even for my crazy GSP who is a destruction artist. This is, the favorite toy his go to in the toy box.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
V
Verified Purchase
VanillaPepper
Chelsea, US
★★★★★ 5
Indestructible Toys My Dobermans ❤️
Size: Large, Color: Mesh Green
Actually Respect! goDog Is a Lifesaver The variety of size and colors are phenomenal 😇 I have two Dobermans — serious, determined power chewers — and I’ve spent years trying to find toys that survive even a few days. I’ve tried the big brands (Kong, Goughnuts, Jolly Ball, you name it) — and while some toys last a little while, almost everything eventually ends up shredded, de-squeaked, or in pieces. goDog toys are the ONLY plush toys my Dobermans won’t destroy. We own multiple goDog toys now — dragons, dinosaurs, lizards — mostly in the large size (perfect for Dobermans), but even a few medium-sized ones hold up surprisingly well. Here’s what’s amazing: • They love them — actually carry them around, toss them, chew them gently, and squeak them happily. • They do not rip them apart — no matter how much tugging, chewing, or wrestling happens. • Large sizes are best for Dobermans (and other big breeds) — but even mediums survive for calmer play sessions. • No ripped seams, no stuffing everywhere, and no destroyed squeakers after months of use. What makes goDog toys different? The secret is their Chew Guard Technology — • A reinforced, high-strength inner mesh layer under the soft plush • Double-stitched seams • Durable yet flexible material that somehow resists punctures, tears, and brutal shaking The outside stays soft and fun, but the inside is built like armor. It’s NOT a super hard rubber or rough canvas — it still feels like a cuddle toy, but it’s engineered to survive serious chewing. Materials include: • Durable polyester plush • Chew Guard inner lining (high-tensile mesh fabric) • Reinforced stitching • Non-toxic squeakers • Safe for dogs to play with long-term Real Owner Advice: • Always size up if you have a heavy chewer — large sizes are a must for Dobermans or similarly strong breeds. • Medium sizes are fine if you supervise or your dog is more moderate with toys, but the large toys are built tougher overall. Final Thoughts: If you have big dogs, strong jaws, or just tired of wasting money on destroyed toys — goDog toys are a must. No other plush-style toy even comes close. My Dobermans will destroy almost anything… but they treat their goDog toys like treasured companions. No holes, no rips, just happy dogs. Follow me here on Amazon for more honest, dog-tested reviews! Like this review if it helped — I’ll be uploading even more proven tough toys and pet essentials soon!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 29, 2025
B
Verified Purchase
BB
Belleville, US
★★★★★ 4
Surface Fabric is very durable
Size: Small, Color: Hot Pink
Surface Fabric is very durable, but the squeaker didn't last two months. I have urged the manufacturer to find a strong more durable squeaker for their product. My dogs really enoys it when the speaker works. One of his 3 work. I have just bought two more he likes them so much. He takes it to bed every night to catch it once or twice before sleeping. Also loves to catch it a few times during the day.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
T
Verified Purchase
Taraknits
Battle Creek, US
★★★★★ 5
Best. Toy. Ever. For My Superchewer!
Size: Large, Color: Skinny Green, Size: Large, Color: Skinny Green
Best toy ever! My dog destroys toys. Usually within about 15 minutes, she has de-squeakered and defluffed them. By the second day, she has tug-of-war-ed them to shreds. From the time we got this adorable dragon out of the package, she LOVED it. She set to work. It’s been a week, and while she has dewinged him, he lost his squeaker after a few days, and he looks a bit rough, he’s still in one piece! And, we’ve had HOURS of tug-of-war with minimal rips! She’s obsessed 😍 I ordered two more today. We’ve finally found the perfect toy for my baby!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 18, 2026

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