S-91268A374 7/16"-14 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 provides superior resistance to breaking under extreme loads, ensuring long-term reliability in demanding applications.
- Grade 8 steel construction with Rockwell C33 hardness delivers outstanding durability and wear resistance, reducing replacement frequency and maintenance costs.
- Partially threaded 7/16"-14 UNC coarse thread design allows for faster installation and better grip in softer materials, improving assembly efficiency.
- Class 2A thread fit with external hex drive ensures precise, easy engagement with standard tools, minimizing cross-threading risks and installation errors.
- Full compliance with ASME B18.2.1 and SAE J429 standards guarantees consistent quality and interchangeability, meeting rigorous industrial specifications.
- RoHS 3 and REACH environmental compliance ensures safe use in regulated industries, supporting sustainable and responsible manufacturing practices.
- Right-hand coarse threading provides robust holding power in high-vibration environments, maintaining joint integrity over time.
Professional Applications & Engineering Value
This Grade 8 hex head screw is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where high tensile strength and vibration resistance are paramount. The 7/16"-14 UNC coarse thread and partially threaded shank optimize load distribution, reducing stress concentrations that lead to fastener failure. Made from high-grade steel with Rockwell C33 hardness, it withstands harsh conditions without compromising performance. The external hex drive facilitates quick, secure tightening with common tools, streamlining maintenance and reducing downtime in industrial settings.
Specification Summary & Compliance
This fastener features a 2-1/2" length with Class 2A thread fit and UNC coarse threading, ensuring precise dimensional accuracy per ASME B18.2.1 and SAE J429 Grade 8 standards. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications.
