S-91268A232 1 1/4"-7 x 14" 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 for reliable performance in demanding applications
- Superior wear resistance thanks to Rockwell C33 hardness, ensuring extended service life under high-stress conditions
- Optimized thread engagement with partial threading and minimum 3" thread length for secure fastening in thick materials
- Quick installation through coarse UNC threads and external hex drive design, reducing assembly time
- Precise thread compatibility with Class 2A fit, providing consistent mating with standard nuts and components
- Heavy-duty construction using Grade 8 steel, making it suitable for critical structural applications
- Regulatory compliance meeting RoHS 3 and REACH environmental standards for safe industrial use
Professional Applications & Engineering Value
These Grade 8 hex head screws deliver exceptional engineering value for heavy-duty industrial applications where failure is not an option. The 1 1/4"-7 UNC coarse thread configuration provides superior pull-out resistance in structural steel, heavy machinery, and construction equipment. The partial threading design concentrates strength where needed most, while the external hex drive allows for high-torque installation with standard tools. Manufactured from high-strength steel with Rockwell C33 hardness, these fasteners withstand vibration, shock loads, and extreme conditions in mining, agricultural, and transportation equipment. The combination of 150,000 psi tensile strength and precise Class 2A thread fit ensures reliable performance in critical joints, reducing maintenance downtime and replacement costs.
Specification Summary & Compliance
This 14" length hex head screw features 1 1/4"-7 UNC coarse threads with Class 2A thread fit for precise dimensional accuracy. The fastener meets ASME B18.2.1 and SAE J429 manufacturing specifications, ensuring consistent quality and performance. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility and workplace safety standards.
