Why Upgrade to ARP Bolts?

Generic bolts:

• Stretch under load
• Strip easily
• Have inconsistent thread tolerances

ARP Fixes That:

• High-strength alloy steel construction
• Precision-machined threads for smooth engagement
• 12-point head design for better torque control
• Included washers for proper load distribution
• Black oxide finish for corrosion resistance

Translation: they torque properly, stay tight, and don’t look like trash.

ARP 642-one thousand Black Oxide three/eight-sixteen” RH Thread 1.000″ UHL 12-Aspect Bolt with three/eight” Socket and Washing machine, (Set of five)

Universal Fitment (3/8-16 Applications)

The 3/8-16 thread size with 1.000” length makes this kit extremely versatile:

Common Uses:

• Engine accessories and brackets
• Intake manifold components
• Water pump and alternator mounting
• Transmission and bellhousing hardware
• Custom fabrication and motorsport applications

Popular Platforms:

• Small Block Chevy / Ford builds
• LS swap accessory mounting
• Classic muscle cars and hot rods
• Race and track builds

If your project uses 3/8-16 hardware… this is a direct upgrade.

Key Features

• Thread Size: 3/8-16 (RH thread)
• Length: 1.000” under head
• Head Style: 12-point (3/8” socket)
• Material: High-strength ARP alloy steel
• Finish: Black oxide
• Includes: Washers
• Quantity: Set of 5 bolts

Performance Benefits

• Maintains consistent clamping force
• Prevents thread damage and bolt stretch
• Improves durability under vibration and load
• Enhances overall build quality and reliability

No more guessing if your hardware is going to hold.

Package deal Dimensions: 0.762 H x 5.842 L x 7.366 W (centimeters)
Made in USA
Fasteners 12pt Bolts
Phase quantity: 642-one thousand

Installation Notes

• Use a 3/8” 12-point socket
• Apply ARP Ultra-Torque or anti-seize depending on application
• Torque according to application specs

Why ARP?

Because even “basic bolts”:

• Fail when they’re cheap
• Matter when under load
• Are easier to upgrade now than fix later

Final Verdict

The ARP 642-1000 bolt kit is a go-to upgrade for any builder who wants strength, consistency, and a clean install.

Simple, reliable, and way better than whatever random bolts were in your toolbox.