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ARP 613-1250 Stainless Steel 12-Point Bolts 3/8-16 x 1.250" 5-Pack

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

613-1250
07/13/2036 6:10 AM
Sale Price

$14.57

2 left at this price

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Usually delivered within 2 days

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No Hassle Returns

Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 613-1250 is a set of five premium stainless steel bolts designed for engine and performance applications where corrosion resistance and reliability are essential. These bolts feature a 3/8-16 thread size with a 1.250-inch under-head length, providing secure fastening for a variety of automotive and marine applications.

Key Features:

  • High-quality polished stainless steel construction for superior corrosion resistance
  • 12-point head design allows for easier installation in tight spaces with multiple engagement positions
  • 3/8-16 thread size with 1.250-inch under-head length
  • 3/8-inch socket size for standard tool compatibility
  • Polished finish provides professional appearance and additional corrosion protection
  • Convenient 5-pack quantity for small projects or replacement needs

ARP (Automotive Racing Products) is renowned for manufacturing high-strength, precision-engineered fasteners trusted by professional engine builders and racers worldwide. These stainless steel bolts are ideal for applications exposed to moisture, heat, and corrosive environments where standard bolts may fail prematurely.

Products specifications

Fastener Finish

Polished

Fastener Head Style

12-Point

Fastener Material

Stainless steel

Fastener Yield Strength (psi)

170,000 psi

Quantity

Sold as a set of 5.

Size

3/8-16 x 1.25

Thread Size

3/8-16 in.

Underhead Length (in)

1.250 in.

Washers Included

Yes

Wrench Diameter

3/8 in.

Wrenching

3/8

Quick understandable

Very good service

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OVERALL EXPERIENCE VERY SATISFYING.

good deal

Fast and easy, thank you guys

I could not use my PayPal since i do not have a PayPal Credit Card.

Had the right parts, had the best prices - fast and easy!

I bought this item for my fiance and he loves it! He was completely happy with the price we paid...

quick and easy

Best prices I found online.. processed same day and recieved same week..packaged great and works great.

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