Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 7 - Jul 12
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
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:
- 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
4.3 ★★★★★
Based on 347 reviews
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Product Reviews
★★★★★ 5
JUST RIGHT
Color: 2024-2025 Black
PERFECT FIT WORKS AS ADVERTISED
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
★★★★★ 4
No encaja exactamente
Color: 2024-2025 Black
No encaja exactamente
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2026
★★★★★ 5
Fit and finish is great.
Color: 2024-2025 Black, Color: 2024-2025 Black
Looks just like the passenger side so now the cab looks submetrical. Only wish they were true grab handles but it is strong and secure.
I did remove my stock speaker cover that has the JBL logo and placed it on the UltraEra pillar. Some work was involved.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
★★★★★ 5
El consumidor
Color: 2024-2025 Black
Le quedó fenomenal a una Tacoma Sport, 2025
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 5, 2026
★★★★★ 5
Must have and should be standard.
Color: 2024-2025 Black
Not sure why these aren't standard, but a must have. Fits like factory and bolts on rock solid. Easy install and took me about 10 mins. Color matches trim perfectly. Just wish I could've swapped the speaker cover with the JBL marked cover, but the factory uses push tabs and not screws. I didn't want create any loose parts that would vibrate later. For the cost, it isn't a bad accessory. Worth it in my opinion.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 20, 2025