S-91286A454 3/4"-10 x 1 3/4" 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 applications, reducing the risk of fastener failure.
- Superior corrosion resistance provided by the zinc-flake coating, extending service life in harsh industrial environments.
- High hardness rating (Rockwell C33) offers excellent wear resistance and durability under repetitive loads.
- Coarse UNC threads with Class 2A fit enable quick assembly and secure fastening, minimizing installation time.
- Full threading along the 1 3/4" length allows for adjustable grip and consistent clamping force across various material thicknesses.
- External hex drive design facilitates easy installation and removal with standard tools, improving maintenance efficiency.
- Compliance with major standards including ASME B18.2.1 and SAE J429 ensures consistent quality and interchangeability.
Professional Applications & Engineering Value
This Grade 8 hex head screw delivers critical engineering value in heavy machinery, structural steel connections, and industrial equipment where vibration resistance and load-bearing capacity are paramount. The zinc-flake coated steel construction addresses common corrosion challenges in outdoor or chemically exposed settings, while the coarse UNC thread design prevents cross-threading during high-speed assembly operations. With its 150,000 psi tensile strength and Rockwell C33 hardness, this fully threaded fastener maintains clamp load integrity under extreme dynamic stresses, making it ideal for construction, automotive, and manufacturing applications requiring dependable, high-strength bolting solutions.
Specification Summary & Compliance
Manufactured to Class 2A thread fit tolerances with 3/4"-10 UNC coarse threads and compliant with ASME B18.2.1 and SAE J429 Grade 8 specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use in regulated industries.
