ARP Hex Bolt 100-7201 Platinum Chromoly Steel Flat Head Fastener

Description

Product Overview

The ARP 100-7201 hex bolt is engineered for the most demanding automotive environments where strength, durability, and precision matter. Constructed from 8740 Chrome Moly (chromoly) steel, the bolt is painted with a platinum finish that resists corrosion while delivering a sleek, professional appearance. The flat head design offers a low‑profile mounting surface, reducing interference with surrounding components and ensuring a clean, flush fit on rocker arm studs. With a thread size of M10x1.50 (3/8″‑24 UNC) and a Grade 10.9 hardness rating, this fastener exceeds standard automotive specifications, providing a tensile strength that can handle high‑rpm engine loads. The kit includes sixteen individual bolts, each weighing approximately 15.2 ounces, and packaged in dimensions of 1.21 x 14.5 x 6 inches for easy storage and handling. Manufactured by ARP, a brand renowned for performance‑grade hardware, the product carries the ARP‑100‑7201 model number and complies with industry standards such as UNC thread type and 1A thread class. Designed for professional mechanics and serious enthusiasts, the bolt’s hex head allows for straightforward installation with standard tools, while the right‑hand thread ensures reliable torque application.

Usage

This hex bolt is intended for use in high‑performance automotive applications, particularly as a rocker arm stud in racing and street‑driven engines. Its robust construction makes it suitable for engines that experience extreme thermal cycling, high horsepower output, and frequent maintenance. Install the bolt into the rocker arm stud hole, torque to the manufacturer‑specified value, and benefit from a secure, vibration‑resistant connection that maintains valve timing accuracy. The flat head profile is especially advantageous in tight engine bays where clearance is limited, preventing contact with adjacent components such as camshafts, timing chains, or oil passages. Ideal for both new builds and engine rebuilds, the bolt can be used by professional shops, performance shops, and dedicated hobbyists who demand consistent, repeatable results. Its compatibility with standard M10x1.50 and 3/8″‑24 UNC threads means it fits a wide range of engine platforms, from classic American V8s to modern European designs. The kit’s sixteen‑piece quantity ensures you have enough hardware for multiple installations or future replacements without compromising on quality.

Why Choose Us

Choosing ARP means selecting a brand with a legacy of engineering excellence and a commitment to rigorous testing. Every bolt undergoes a multi‑stage heat‑treatment process that enhances grain structure, resulting in superior fatigue resistance and consistent performance under load. The platinum finish is not merely aesthetic; it provides an additional barrier against rust and chemical exposure, extending the service life of the fastener. ARP’s own quality rating system guarantees that each bolt meets or exceeds the specifications required for high‑stress automotive applications, giving you confidence that the hardware will hold up under the most demanding conditions. In addition, ARP offers comprehensive technical support, including torque specifications, installation guidelines, and a responsive customer service team ready to assist with any questions. When you purchase this bolt, you also receive the benefit of a well‑documented warranty that protects against manufacturing defects, reinforcing the brand’s dedication to durability and customer satisfaction.

Key Features

• Premium chromoly steel construction delivers unmatched strength and fatigue resistance for high‑performance engines.
• Platinum painted finish provides superior corrosion protection and a professional appearance.
• Flat head design ensures a low‑profile fit, minimizing clearance issues in tight engine bays.
• Grade 10.9 hardness rating offers high tensile capacity, ideal for demanding racing and street applications.
• Backed by ARP’s dedicated customer support and warranty, giving you confidence and peace of mind.

FAQ

What torque value should I use when installing the ARP 100-7201 hex bolt?

The recommended torque for the ARP 100-7201 hex bolt is typically between 70 and 80 ft‑lb (95‑108 Nm), but you should always consult the specific engine manufacturer’s service manual for the exact value. Using a calibrated torque wrench ensures the bolt is tightened to the correct specification, preventing over‑tightening that could damage threads or under‑tightening that could lead to loosening under load.

Can this bolt be used on engines with different thread standards?

Yes, the bolt features a dual‑thread specification: M10x1.50 (metric) and 3/8″‑24 UNC (imperial). This makes it compatible with a wide range of engine designs that use either metric or standard American thread sizes. Always verify the thread pitch of your application before installation to ensure proper fit.

Is the platinum finish durable enough for off‑road or marine environments?

The platinum finish is specifically formulated to resist corrosion from moisture, road salts, and mild marine exposure. While it offers excellent protection for most automotive environments, for extreme marine conditions you may consider applying an additional marine‑grade coating for extra assurance.

How many bolts are included in the kit and are they individually packaged?

The kit contains sixteen hex bolts, each individually inspected for quality. They are packaged together in a compact box that measures 1.21 x 14.5 x 6 inches, making storage and inventory management simple for both professional shops and home garages.

What warranty does ARP provide for this product?

ARP offers a limited warranty that covers any manufacturing defects for a period of one year from the date of purchase. This warranty does not cover damage caused by improper installation, misuse, or external factors such as corrosion from non‑standard chemicals. For warranty claims, retain the original packaging and proof of purchase.