S-91286A462 3/4"-10 x 2 1/2" ASME B18.2.1, SAE J429 High-Strength Grade 8 Steel Hex Head Screws
High-Strength Grade 8 Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 150,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Superior corrosion resistance with zinc-flake coating extends service life in harsh environments, minimizing maintenance and replacement costs.
- High hardness rating (Rockwell C33) provides excellent wear resistance and durability under heavy loads and vibrations.
- Coarse UNC threading offers quick and easy installation, reducing assembly time and improving efficiency in demanding conditions.
- Full threading along the 2 1/2" length allows for maximum grip and adjustability in various material thicknesses.
- External hex drive design ensures secure tool engagement and high torque application, preventing stripping and enhancing installation reliability.
- Class 2A thread fit guarantees consistent, precise engagement with nuts and tapped holes, ensuring smooth assembly and reduced rework.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered for heavy-duty applications where reliability and strength are critical. Made from high-strength steel and featuring a zinc-flake coated finish, it effectively resists corrosion in industrial settings such as construction, machinery assembly, and automotive systems. The UNC coarse thread and right-hand threading provide robust holding power and ease of installation in thick materials or under vibration, addressing common issues like loosening and fatigue. With its external hex drive, it supports high-torque applications, making it ideal for equipment that requires frequent maintenance or disassembly. This fastener delivers consistent performance in demanding environments, reducing downtime and enhancing operational safety.
Specification Summary & Compliance
This 3/4"-10 hex head screw adheres to precise dimensional standards with a Class 2A thread fit for consistent accuracy. It meets ASME B18.2.1 and SAE J429 specifications, ensuring reliable manufacturing quality. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and regulatory requirements in industrial supply chains.
