Hex Bolt ARP Stainless Steel Heavy-Duty 8 mm x 1.25 mm Black Hex Head

Description

Product Overview

The ARP hex bolt is engineered for the most demanding automotive environments. Constructed from premium stainless steel, the bolt resists corrosion while maintaining structural integrity under extreme temperatures. A black painted finish adds an extra layer of protection and a sleek appearance that complements performance upgrades. The bolt conforms to a standard M8-1.25 thread size, offering compatibility with a wide range of exhaust systems and chassis components. With a grade 8.8 rating, it delivers a maximum shear strength of 56,667 psi, ensuring that the connection remains secure even under high torque and vibration. The hex head design provides easy access for installation using standard tools, reducing labor time and minimizing the risk of rounding off the fastener. Each bolt is individually inspected to meet ARP’s stringent quality standards, guaranteeing consistency across every piece.

Usage

This bolt excels in applications where durability and reliability are paramount. It is ideal for securing exhaust headers, performance manifolds, and turbocharger mounts where high heat and pressure are common. Mechanics and enthusiasts alike trust ARP bolts for both street and track use, as the stainless steel composition tolerates repeated heating cycles without losing strength. The black finish also helps hide any minor scratches or discoloration that may occur during installation, preserving the aesthetic of the vehicle. In addition to exhaust systems, the bolt can be used for chassis reinforcement, suspension upgrades, and any scenario requiring a robust, corrosion‑resistant fastener. Its universal thread style (UNC/UNF) ensures compatibility with a variety of components, making it a versatile choice for custom builds and OEM replacements alike.

Why Choose Us

Choosing ARP means selecting a brand with decades of engineering expertise and a reputation for precision. Each hex bolt undergoes a multi‑stage manufacturing process that includes CNC machining, heat treatment, and surface coating to achieve optimal performance. ARP’s heavy‑duty classification means the bolt is designed to exceed standard specifications, providing an extra safety margin for high‑stress applications. The company offers comprehensive technical support, including installation guides and torque specifications, ensuring that customers can install the bolt correctly the first time. Additionally, ARP stands behind its products with a warranty that covers material defects, giving buyers confidence in their investment. The combination of superior material selection, meticulous craftsmanship, and dedicated after‑sales service makes ARP the preferred choice for professionals and hobbyists seeking reliable fastening solutions.

Key Features

• Premium stainless steel construction resists rust and corrosion for long‑term durability.
• Grade 8.8 rating provides high shear strength, handling extreme torque and vibration.
• Black painted finish adds visual appeal and extra protection against heat discoloration.
• Standard M8‑1.25 thread fits a wide range of exhaust and chassis components.
• Backed by ARP’s technical support and warranty for peace of mind.

FAQ

What makes the ARP hex bolt different from standard bolts?

ARP bolts are manufactured to tighter tolerances and undergo additional heat‑treatment processes, resulting in higher strength and better resistance to fatigue. The stainless steel material also offers superior corrosion resistance compared to typical carbon steel fasteners.

Can I use this bolt for both street and track applications?

Yes. The bolt’s grade 8.8 rating and stainless steel composition make it suitable for everyday driving as well as high‑performance track use where temperatures and stresses are significantly higher.

What torque specification should I use when installing this bolt?

ARP recommends a torque of 70‑80 Nm (52‑59 ft‑lb) for the M8‑1.25 hex bolt when securing exhaust headers. Always refer to the vehicle’s service manual and ARP’s installation guide for exact values.

Is the black finish purely cosmetic, or does it provide functional benefits?

The black coating serves both aesthetic and functional purposes. It helps conceal minor scratches and protects the stainless steel surface from heat‑induced discoloration, extending the bolt’s visual lifespan.

Do you offer bulk pricing for larger orders?

Yes. ARP provides volume discounts for wholesale purchases. Contact our sales team with your required quantity, and we will provide a tailored quote.