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ARP 644-4000 Stainless Steel Bolt - 12-Point Kit 5-Pack

Manufacturer

Picture for manufacturer ARP

Part Number

644-4000
7 reviews
Sale Price

$17.32

Estimated ship date Thursday, February 11

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Product Details

The ARP 644-4000 is a premium 5-piece bolt kit featuring stainless steel or chrome moly fasteners engineered for superior strength and reliability in automotive, marine, and trailer applications. These professional-grade bolts are manufactured from specially alloyed ARP 300 stainless steel or heat-treated 8740 chrome moly with black oxide finish, providing exceptional performance and durability.

Key Features:

  • Premium ARP 300 stainless steel construction with polished finish
  • 12-point head design for improved grip and torque application
  • Rated at 180,000 psi tensile strength for substantial safety margin over Grade 8 hardware
  • Includes washers for complete installation readiness
  • Rust-resistant stainless steel finish for maintenance-free operation
  • Heat-treated 8740 chrome moly option available with black oxide coating

ARP fasteners are precision-manufactured to exacting tolerances, ensuring consistent clamping force and reliable performance in demanding applications. The corrosion-resistant stainless steel construction maintains its attractive appearance while providing long-term durability in harsh environments. Whether you're working on engine components, suspension systems, or general mechanical assemblies, these professional-grade bolts deliver the quality and strength that ARP is known for throughout the automotive performance industry.

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 4

Thread Size

3/8-16 in.

Underhead Length (in)

4.000 in.

Underhead Length (mm)

101.6mm

Washers Included

Yes

Wrench Diameter

7/16 in.

Wrenching

7/16

easy deal!!

Prices were very fair, had to check back a few times to the listing to determine if item was sold in pairs and/or individually. Overall however the product looks good.

I bought gauges from here and it was the best price around. They shipped it quickly and it should be here soon. Ill buy from here again.

BEST PRICE AROUND, HANDS DOWN. Shipping was fast and communication was impeccable. THANKS FOR THE PROFESSIONALISM.

Very good website. Easy to use. found the parts i needed and the order process was very easy since i could just login using my amazon account. Very convenient. Received my parts in a week.

I ordered this product and Wednesday in the morning and it was on my door step Thursday morning with regular shipping. The ordering process was super easy and the price was $35 cheaper than any other online retailer. The Rack is awesome, easy to assemble took me about 20 minutes by myself, put on my jeep hooked up the bikes and off I went, fantastic design, I highly recommend the Rola NV2 bike rack and highly recommend Autoplicity

I ordered a rear sway bar for my MINI Cooper on Sunday and it was at my door on Wednesday! Autoplicity had the absolute cheapest price for this bar and I was very impressed with the shipping speed. I would definitely recommend them to my friends!

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