S-91286A492 3/4"-10 x 8" 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 load-bearing capacity with 150,000 PSI tensile strength, ideal for high-stress industrial applications.
- Superior corrosion resistance due to zinc-flake coating, extending service life in harsh environments.
- Reliable mechanical performance from Grade 8 steel and Rockwell C33 hardness, ensuring durability under heavy loads.
- Easy installation and removal with external hex drive and coarse UNC threads, reducing assembly time.
- Precise thread engagement with Class 2A fit, minimizing the risk of cross-threading and ensuring secure fastening.
- Versatile partial threading allows for effective clamping in a wide range of material thicknesses.
- Compliance with major standards including ASME B18.2.1 and SAE J429, guaranteeing quality and interchangeability.
Professional Applications & Engineering Value
This Grade 8 steel hex head screw is engineered to address critical challenges in heavy-duty sectors like construction, machinery assembly, and structural frameworks. Its 150,000 PSI tensile strength and Rockwell C33 hardness provide robust resistance to shear and tensile forces, preventing failure under extreme loads. The zinc-flake coated finish offers superior protection against corrosion, making it suitable for outdoor or chemically exposed environments. With coarse UNC threading and a partial thread design, it ensures quick installation and reliable grip in thick materials, reducing downtime and maintenance costs. Ideal for bolting structural steel, heavy equipment, and industrial fixtures, this screw delivers consistent performance where safety and durability are paramount.
Specification Summary & Compliance
This screw adheres to Class 2A thread fit for precise dimensional accuracy and smooth assembly. It meets ASME B18.2.1 and SAE J429 Grade 8 specifications, ensuring consistent manufacturing quality. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and safety regulations for industrial use.
