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ARP 300-8333 12-Point Hex Nuts 7/16-20 Chrome Moly 10-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

300-8333
07/13/2036 4:57 AM
Sale Price

$17.94

In Stock (10+)

delivery box

Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 300-8333 is a set of ten high-strength 12-point hex nuts designed for demanding automotive and racing applications. Manufactured from premium 8740 chrome moly steel, these fasteners deliver exceptional strength and reliability where it matters most.

Key Specifications:

  • Thread size: 7/16 inch - 20 threads per inch
  • 12-point design for precise torque application and easy wrench positioning
  • 1/2 inch socket size for standard tool compatibility
  • Tensile strength: 180,000 PSI for maximum clamping force
  • Black oxide finish for corrosion resistance and professional appearance
  • Chrome moly steel construction for superior strength-to-weight ratio

ARP fasteners are precision CNC-machined and heat-treated to exacting standards, making them the preferred choice for engine builders and performance enthusiasts. The 12-point configuration allows for finer angle adjustments during installation compared to standard 6-point nuts. Each nut is manufactured in the USA and meets or exceeds OEM specifications for critical engine assembly applications.

This 10-piece pack provides sufficient quantity for typical cylinder head installations or other high-stress fastening requirements where reliability cannot be compromised.

Products specifications

Fastener Yield Strength (psi)

150,000 psi

Nut Finish

Black oxide

Nut Material

Steel

Nut Style

12-point

Nylon Insert

No

Quantity

Sold as a set of 10.

Self-Locking

No

Size

7/16-20

Socket

1/2

Thread Size

7/16-20 RH in.

Washers Included

No

Wrench Diameter

1/2 in.

Item and shipping as advertised.

The part was advertised as Goodyear but Goodyear sold or divested its interest in Gatorback belts to Continental. The belt I received was a Continental Elite Poly-V Belt which is the same as the Goodyear Gatorback belt. Autoplicity needs to update its website. I contacted Autoplicity after placing the order when I found on another website that Goodyear no longer makes Gatorback and asked what belt I was going to be sent. Justine O, a Senior Production Specialist directed me to the generic Goodyear website which had nothing about Gatorback belts because they no longer make Gatorback belts... thank you Justine O, Senior Production Specialist for absolutely nothing! Bottom line, Autoplicity may, or may not have what you want... but one thing is for certain, their customer service is as useless as every other customer service you have ever dealt with!!!

Nice easy to find the parts I need

Great customer service

I appreciate getting namebrand parts at a good price.

Pretty good pricing on parts.

Good price.good shipping.

Hope it works

Shipment was quicker than I thought and the product was just as described. It was cheaper than else where. Thank you Autoplicity

Only place I found that had the product I needed. Extremely satisfied!

Best Price and fast shipping, not bad price for the shipping cost

fast and efficient site. Good prices

Great products at great prices! Very quick shipping.

Great Price -- Better Than AMAZON ! Great Delivery -- Great email with status of order etc.

Lowest prices and fast shipping made this a great transaction.

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