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ARP 740-1125 Black Oxide 12-Point Bolt 1/4-28 x 1.125 Inch

Manufacturer

ARP

<h3>The Gold Standard in Performance Fasteners</h3> <p>When racing enthusiast Gary Holzapfel recognized that fastener failure was causing many engine breakdowns in 1968, he founded Automotive Racing Products (ARP) to solve a critical problem in motorsports. Drawing on his aerospace fastener manufacturing experience, Holzapfel created a company that would revolutionize the performance fastener industry. Today, ARP stands as the world's premier manufacturer of high-strength bolts, studs, nuts, and specialized hardware for racing and high-performance applications.</p> <p>ARP controls all aspects of the manufacturing process in-house, with all operations closely monitored, enabling the company to maintain its reputation for zero-defect quality. Every fastener undergoes forging, heat treatment, thread rolling, and precision finishing at ARP's Southern California facilities, which span over 115,000 square feet. This vertically integrated approach ensures that each component meets exacting standards for strength, fatigue resistance, and reliability under extreme conditions.</p> <h3>Engineered for Championship Performance</h3> <p>ARP's customer roster reads like a who's who of professional motorsports. The product line ranges from quality high-performance OEM replacement parts to exotic specialty hardware for Formula 1, IndyCar, NASCAR and NHRA drag racing and marine applications. The company's fasteners have secured victories in virtually every major racing championship worldwide, from Top Fuel dragsters to Formula One cars, proving their worth under the most demanding conditions imaginable.</p> <p>The brand's <a href="/48-arp-engine-cylinder-head-bolt-set-10306">engine cylinder head bolt sets</a> represent the cornerstone of ARP's catalog, offering engine builders the clamping force and reliability needed to prevent head gasket failure in high-boost and high-compression applications. These precision-engineered fasteners utilize proprietary materials and heat treatments that deliver up to ten times the fatigue strength of conventional bolts, making them essential for any serious performance build.</p> <p>For engine internals, ARP manufactures <a href="/48-arp-engine-connecting-rod-5276">connecting rods</a> designed to withstand extreme cylinder pressures and high RPM loads. Each rod is manufactured to aerospace standards with tight tolerances and superior material properties. Whether you're building a street performance engine or a full competition powerplant, ARP connecting rods provide the strength and consistency that professional engine builders demand.</p> <h3>Complete Fastener Solutions</h3> <p>Beyond engine components, ARP's product range extends throughout the entire vehicle. The company's <a href="/48-arp-wheel-lug-stud-7680">wheel lug studs</a> offer critical safety and performance benefits for racing and high-performance street applications, providing greater clamping force and durability than factory studs. ARP's product line contains thousands of part numbers and has expanded to include virtually every fastener found in an engine and driveline.</p> <p>Individual <a href="/48-arp-engine-cylinder-head-bolt-5308">engine cylinder head bolts</a> are also available for custom applications or specific replacement needs, manufactured to the same exacting standards as complete sets. This flexibility allows builders to source exactly what they need for specialized builds or repairs without compromising on quality.</p> <p>What sets ARP apart is not just the breadth of their catalog, but their willingness to develop custom solutions for unique applications. The company maintains complete R&D capabilities, including metallurgical research, product design, prototype machining, and extensive laboratory testing. This engineering expertise ensures that whether you're installing a simple head stud kit or building a record-setting race engine, ARP fasteners deliver the reliability and performance that professionals trust.</p>

Part Number

740-1125
08/02/2036 1:01 AM
Sale Price

$10.29

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The ARP 740-1125 is a premium-quality chromoly bolt designed for high-performance automotive, marine, and racing applications. This bolt features a 1/4 inch-28 fine thread with 1.125 inch under-head length (UHL) and a 12-point head design that provides superior torque application and accessibility in tight clearance situations.

Key Features:

  • Heat-treated 8740 chromoly steel construction with black oxide finish
  • Rated at 180,000 psi tensile strength - exceeding Grade 8 hardware specifications
  • 12-point head design with 5/16 inch wrenching size for precise installation
  • 1/4 inch-28 fine thread for maximum clamping force
  • 1.125 inch under-head length (UHL)
  • Corrosion-resistant black oxide coating
  • Sold in 5-piece sets with washers included

ARP bulk fasteners are manufactured to the same exacting standards as their application-specific kits, using premium SDF (seamless and defect-free) steel stock. These bolts provide a substantial safety margin over conventional hardware, making them ideal for engine builds, suspension components, chassis fabrication, and any critical fastening application where reliability is paramount.

nice and easy

2nd time ordering and have had a great experience both times

Overall experience was good until we had to return the item because it wouldn't work with the seat we had. Problem is that when we tred to get the specs on the item you didn't have any of the measurements available. So I was told that if it didn't work I could retun it. When I did you said it was because I ordered wrong so I would be charged to return it. It was wrong because you didn't have any info on the actual size and the only way to see if it would work was to order it.

Great place for instock accurate information

You have the part I need while other auto part stores didn&amp;#039;t. Great!

quick and easy!

Great service, perfect fit and speedy delivery! I&rsquo;ll be back.

The free shipping sold me on this sale. Very happy

received in good shape

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