ARP 10-24 x .625 12pt SS bolts

ARP Stainless Steel Precision Fasteners You Can Torque With Confidence in Any Engine Bay Application

When stock hardware is not up to the task, ARP stainless steel bolts deliver the tensile strength, corrosion resistance, and precision thread form that racing and performance engine builders trust. The ARP 701-0625 is a 5-pack of #10-24 UNC, 0.625-inch underhead length, 12-point head stainless steel bolts packed on a card with washers. These bolts are machined from ARP 300 series stainless steel and polished to a bright natural finish, making them a premium upgrade over plated factory fasteners anywhere a #10-24 thread is called for in your build.

The 12-point head design allows use of a socket drive for high-torque applications in tight spaces where a standard hex wrench cannot achieve a full swing. Each bolt is held to ARP's dimensional tolerances, with threads rolled after heat treatment for maximum root strength. At a nominal tensile strength of 180,000 psi, ARP stainless bolts are rated far above standard hardware-store fasteners and are suitable for use in fuel system brackets, intake components, valve covers, accessory mounts, and general engine bay hardware where appearance and corrosion resistance matter.

ARP 701-0625 Key Features

• 5-pack of #10-24 UNC x 0.625 inch 12-point stainless steel bolts
• ARP 300 series stainless steel, 180,000 psi tensile strength
• 12-point head accepts 1/4 inch socket drive for full torque in tight spaces
• Threads rolled after heat treatment for superior fatigue resistance
• Polished natural stainless finish resists rust and corrosion without plating
• Washers included on card with each 5-pack
• Right-hand thread, fully threaded shank
• Universal fit for any application using #10-24 UNC fasteners
• Manufactured by ARP in Ventura, California, USA

Specifications

What's Included

• 5 x ARP 701-0625 #10-24 x 0.625 inch 12-Point Stainless Steel Bolts
• 5 x Matching flat washers

Nuts and thread inserts are sold separately.

Frequently Asked Questions

What does ARP 701-0625 mean and what thread size is it?
The ARP part number 701-0625 identifies a 5-pack of #10-24 UNC stainless steel bolts with a 12-point head and 0.625 inch underhead length. The #10 refers to the bolt diameter (0.190 inches), 24 refers to 24 threads per inch in UNC coarse thread form, and 0.625 is the grip length under the head. This is the standard ARP SAE stainless bolt series in the number 10 diameter.

What is the difference between ARP 300 stainless and regular stainless steel fasteners?
ARP 300 series stainless is a proprietary alloy formulation heat-treated to a minimum tensile strength of 180,000 psi, which is significantly stronger than off-the-shelf 18-8 or 316 stainless fasteners that typically rate between 60,000 and 100,000 psi. ARP also rolls the threads after heat treatment, which work-hardens the thread roots and greatly improves fatigue strength compared to machined threads.

What applications commonly use ARP 701-0625 bolts?
Common uses include valve cover fasteners, intake manifold hardware on small-displacement engines, fuel injection system brackets, accessory brackets, air intake components, ignition module mounting, and any engine bay or chassis location where a #10-24 machine screw thread is used and appearance or corrosion resistance is a priority. They are also popular for sensor brackets, intercooler plumbing mounts, and custom fabrication work.

What wrench or socket size does the ARP 701-0625 12-point head take?
The 12-point head on the ARP 701-0625 accepts a 1/4 inch 12-point socket or a 12-point box-end wrench. Standard 6-point sockets will not properly engage a 12-point head. The 12-point design allows higher torque in confined spaces with shorter arc swings between ratchet clicks.

Are washers included with the ARP 701-0625?
Yes. Each 5-pack card includes matching flat washers for the 701-0625. ARP packs its stainless bolt kits with washers as a standard inclusion so you have hardware ready for installation straight out of the package.

Is the ARP 701-0625 fully threaded?
Yes. At 0.625 inch underhead length in the #10-24 size, the bolt shank is fully threaded from head to tip. Partially-threaded (shoulder) configurations are found on longer ARP bolts in this series.

Does ARP offer a warranty on the 701-0625 bolts?
ARP backs its fasteners with a Limited Lifetime Warranty against defects in materials and workmanship for the original purchaser. ARP bolts are manufactured to aerospace-grade processes and are used in professional racing and OEM applications worldwide.

Can I use ARP 701-0625 bolts in outdoor or wet environments?
Yes. ARP 300 series stainless resists rust and oxidation better than black oxide or zinc-plated steel fasteners in wet, salty, or high-humidity environments. Stainless is a common choice for exhaust heat shields, underbody components, marine applications, and anywhere corrosion protection is critical.

Are there matching ARP stainless nuts for the 701-0625?
ARP offers matching #10-24 stainless nuts and a wide range of complementary 12-point bolts in other lengths and diameters. Check ARP's full stainless SAE bolt series for nuts, washers, and companion fasteners to complete your hardware package.

Installation Instructions

Clean all mating threads before installation. Apply ARP Ultra-Torque fastener assembly lubricant or a clean light oil to threads and under the head of each bolt for accurate torque readings. Install by hand until snug, then tighten with a 1/4 inch 12-point socket to the torque specification required by your specific application. Do not use an impact gun without a verified torque output. Consult your engine builder or component manufacturer for the correct torque value for your application. Re-check torque after the first heat cycle if used on engine components.

WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.