S-91247A931 1"-8 x 7 1/2" 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 120,000 psi tensile strength, ideal for high-stress applications
- Superior corrosion resistance from zinc plating, extending service life in harsh environments
- Reliable thread engagement with Class 2A UNC coarse threads for quick assembly and vibration resistance
- Optimized torque transmission through the external hex drive and large 1 1/2" head width
- Controlled partial threading allowing precise clamping force distribution along the 7 1/2" length
- Consistent mechanical properties ensured by Grade 5 certification and Rockwell C25 hardness
- Regulatory compliance meeting ASME B18.2.1, RoHS 3, and REACH for global project suitability
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this Grade 5 hex head screw delivers critical reliability where fastener failure is not an option. The zinc plated steel construction provides essential corrosion protection for machinery, structural frames, and equipment exposed to moisture or chemicals. Its 1"-8 UNC coarse threading and partial threading design prevent loosening under dynamic loads while enabling rapid installation in construction, automotive, and manufacturing assemblies. The external hex drive and robust head geometry ensure secure tool engagement during high-torque applications, reducing installation errors and maintenance downtime. This screw solves vibration-induced joint failure and alignment challenges in demanding environments.
Specification Summary & Compliance
This 7 1/2" length hex head screw features 1"-8 UNC coarse threads with Class 2A thread fit tolerances per ASME standards. Manufacturing complies with ASME B18.2.1 and SAE J429 Grade 5 specifications, ensuring dimensional accuracy and mechanical consistency. The product is verified RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental and safety regulations for industrial usage.
