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ARP 644-3500 Stainless Steel Bolt - 12-Point Kit 5-Pack

Manufacturer

Picture for manufacturer ARP

Part Number

644-3500
18 reviews
Sale Price

$17.16

Estimated ship date Wednesday, November 18

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Product Details

The ARP 644-3500 is a premium 5-piece fastener kit featuring high-quality 12-point bolts designed for automotive, marine, and trailer applications. These professional-grade bolts are manufactured from specially alloyed ARP 300 stainless steel with a tensile strength nominally rated at 180,000 psi, providing a substantial safety margin over standard Grade 8 hardware.

Key Features:

  • 12-point head design for improved grip and reduced chance of rounding
  • ARP 300 stainless steel construction for superior strength and corrosion resistance
  • 180,000 psi tensile strength rating
  • Polished stainless finish for attractive appearance and rust resistance
  • Maintenance-free performance
  • Includes washers for complete installation

ARP fasteners are engineered to exceed the performance of standard hardware, making them ideal for critical applications where reliability and strength are essential. The stainless steel construction ensures long-lasting durability even in harsh environments, while the polished finish provides a professional appearance.

Products specifications

Fastener Finish

Black oxide

Fastener Head Style

12-Point

Fastener Material

Chromemoly

Fastener Yield Strength (psi)

170,000 psi

Material

Black Oxide

Quantity

Sold as a set of 5.

Size

3/8-16 x 3.5

Thread Size

3/8-16 in.

Underhead Length (in)

3.500 in.

Underhead Length (mm)

88.9mm

Washers Included

Yes

Wrench Diameter

7/16 in.

Wrenching

7/16

Thanks

Perfect match and great delivery timing.

Great

Great

Water Pump doesn't fit, had to buy one from a local auto parts store.

great Service, and easy to navigate there website to find the right part!

Good

Great price and perfect match on parts!

Awesome deal and fast shipping. Will be back!

Best price on the internet for my parts. Shipped out the next morning.

Ordered a Dee Zee bed mat for my truck. Got it right away and it fits like a glove!!!

Very easy to navigate web site. Received my order in excellent condition in a timely manner. Recommend Autoplicity as a company with which to conduct business.

Autoplicity had the best price on the item I wanted. Order process was a little odd. I didn't get any confirmation of my order being placed. So 2 days later I sent an email asking if they had received it. They answered me very quickly, sent me an order confirmation with tracking number, and it turns out my item had already shipped so I had it the next day. So ordered 5/1 and had it in my hand 5/4.

I got the items exactly as described with VERY fast shipping. i highly recommend them to everyone. And I will definitely be shopping there again!

My Superchips Cortex arrived within a few days of order and by far was the best price arround. Product arrived in perfect condition and worked as described. Great deal. Order #10984

Same day shipping. 20 Dollars cheaper than everywhere else!

Item was shipped fast and exactly what I ordered. Great price as well.

Super quick service! Great price and I received the product the day after I ordered it.

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