S-91268A890 3/4"-10 x 10" 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 hardness with Rockwell C33 rating provides excellent resistance to wear and deformation, extending service life.
- Coarse UNC threads offer faster installation and better grip in a variety of materials, improving assembly efficiency.
- Partial threading design allows for precise clamping force control, ideal for applications requiring specific unthreaded shank lengths.
- Class 2A thread fit ensures consistent, reliable engagement with nuts and tapped holes, minimizing cross-threading issues.
- External hex drive facilitates easy installation and removal with standard tools, reducing labor time and effort.
- Compliance with ASME B18.2.1 and SAE J429 guarantees adherence to industry standards for dimensional accuracy and mechanical properties.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and structural assemblies where high tensile strength and durability are paramount. The 3/4"-10 UNC coarse thread provides robust holding power in coarse-grained materials, while the partial threading allows the unthreaded portion to act as a precision dowel, resisting shear forces. Made from high-strength steel and heat-treated to Rockwell C33 hardness, it resists fatigue under dynamic loads, making it ideal for bolting applications in industrial equipment, automotive frames, and infrastructure projects. The external hex drive ensures compatibility with common wrenches, streamlining maintenance and reducing downtime in demanding environments.
Specification Summary & Compliance
This fastener features a 3/4"-10 UNC coarse thread with Class 2A thread fit for standard tolerance, a length of 10 inches, and partial threading. It complies with ASME B18.2.1 and SAE J429 specifications for dimensional and mechanical requirements. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for hazardous substances.
