My Account
Shopping Cart

ARP 612-1000 Stainless Steel 12-Point Bolt 5/16-18 x 1.000 (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

612-1000
07/11/2036 5:03 PM
Sale Price

$13.35

2 left at this price

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The ARP 612-1000 is a precision-engineered stainless steel bolt designed for high-performance engine applications where reliability and corrosion resistance are critical. This 5-pack of polished stainless steel fasteners features ARP's signature 12-point head design for superior wrench engagement and reduced risk of rounding.

Specifications:

  • Thread Size: 5/16 inch - 18 TPI (threads per inch)
  • Under Head Length: 1.000 inch
  • Head Type: 12-point for maximum grip
  • Socket Size: 3/8 inch
  • Material: Polished stainless steel for corrosion resistance
  • Quantity: 5 bolts per pack

ARP (Automotive Racing Products) is the world leader in fastener technology, manufacturing fasteners that exceed OEM specifications. These stainless steel bolts are ideal for engine builds, accessory mounting, and applications where exposure to moisture or chemicals requires superior corrosion protection. The 12-point head design provides 30% more contact area than standard 6-point heads, reducing the chance of fastener damage during installation and removal.

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

5/16-18 x 1

Thread Size

5/16-18 in.

Underhead Length (in)

1.000 in.

Washers Included

Yes

Wrench Diameter

3/8 in.

Wrenching

3/8

Fast process

Great price, free shipping and no tax. What else can you ask for!

Great service

Product was ordered on a Sunday arrived on Tuesday. Great price on product purchased. Will buy from this company again.

Seems like this battery pack will work. I hope so

it was ok

Had no problems

Website a little glitchy but, in the end, I got it done!

No was slightly damaged and one of the boxes inside we're open. All parts were there though.

Great product, fast shipping!!

everything seems to be going ok thinks

Autoplicity was quick and easy to order from. I found just what I was looking for in absolutely no time at all, plus it was shipped extremely quickly. I would definitely order from this site/company again.<br><br>Thanks!

The site was easy to navigate and find what I needed. The price was the best I could find for the Husky weatherbeater floor mats that I needed for my car. Shipping was fast. Can't wait to have them in my car.

Great price, great business and quick shipping. Excellent transaction and would recommend them again.

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy