S-91283A128 1 1/8"-7 x 2" ASME B18.2.1, SAE J429 Medium-Strength Grade 5 Steel Hex Head Screws
Medium-Strength Grade 5 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 100,000 psi tensile strength for reliable performance in demanding applications
- Superior durability and wear resistance thanks to Rockwell C19 hardness and Grade 5 steel construction
- Quick installation and removal with external hex drive and standard 1 11/16" head width
- Optimal thread engagement with Class 2A fit UNC coarse threading that resists vibration loosening
- Full-length fastening capability through complete 2" length threading for maximum grip range
- Industry-standard compatibility meeting ASME B18.2.1 specifications for consistent performance
- Environmental compliance assurance with RoHS 3 and REACH compliance for global industrial use
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where vibration resistance and high tensile demands are paramount. The 1 1/8"-7 UNC coarse threading with Class 2A fit ensures rapid installation while maintaining secure fastening under dynamic loads. Manufactured from high-strength steel with Rockwell C19 hardness, this fully threaded fastener withstands extreme mechanical stress without deformation. The external hex drive design provides superior torque transmission for tight spaces, making it ideal for construction, manufacturing, and maintenance applications requiring reliable, high-performance hex head screws that meet rigorous industry standards.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 1 1/8"-7 UNC coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.2.1 specifications SAE J429, ensuring dimensional accuracy and performance reliability. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial distribution and use in regulated applications requiring certified material safety standards.
