S-91247A247 3/8"-24 x 7" 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 for reliable performance in high-stress applications
- Superior corrosion resistance through zinc plating, extending service life in demanding industrial environments
- Precise thread engagement with Class 2A UNF fine threading ensuring secure fastening and vibration resistance
- Optimized strength-to-weight ratio from Grade 5 steel construction with Rockwell C25 hardness
- Easy installation and removal with external hex drive design providing maximum torque transfer
- Versatile partial threading allowing for both clamping and alignment functions in assembly operations
- Regulatory compliance assurance meeting ASME, SAE, RoHS 3, and REACH standards for quality and safety
Professional Applications & Engineering Value
This Grade 5 hex head screw delivers critical engineering solutions for heavy machinery, structural assemblies, and industrial equipment where high tensile strength and corrosion resistance are paramount. The 3/8"-24 UNF fine threading provides superior resistance to vibrational loosening compared to coarse threads, while the partially threaded design allows the unthreaded shank to bear shear loads effectively. The zinc plated steel construction combats environmental degradation in manufacturing facilities, automotive applications, and outdoor installations. With external hex drive compatibility, technicians can achieve proper torque values using standard tools, reducing installation time and ensuring consistent clamping force in critical joints.
Specification Summary & Compliance
Manufactured to Class 2A thread fit tolerances with UNF (Unified National Fine) thread form per ASME standards. This 7" hex head screw meets ASME B18.2.1 and SAE J429 specifications for dimensional accuracy and mechanical properties. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and restricted substance control. The Grade 5 classification guarantees consistent 120,000 psi tensile strength and Rockwell C25 hardness across production batches.
