S-91571A432 3/4"-10 x 6 1/2" ASME B18.2.6, ASTM A325, ASTM F3125 Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
Medium-Strength Steel Heavy Hex Head Screws for Structural Applications
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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 structural integrity with 120,000 psi tensile strength and Rockwell C19 hardness for reliable performance in demanding applications
- Superior vibration resistance through coarse UNC threads that maintain secure connections under dynamic loads
- Precise installation control with Class 2A thread fit ensuring consistent engagement and reduced assembly issues
- Optimized load distribution from the partially threaded design that concentrates strength where needed most
- Enhanced torque application via the external hex drive and substantial 1 1/4" head width for secure tool engagement
- Long-term reliability in structural applications thanks to Grade A325 certification and steel construction
- Regulatory compliance assurance meeting ASME, ASTM, RoHS 3, and REACH standards for global project acceptance
Professional Applications & Engineering Value
These Grade A325 hex head screws deliver critical engineering solutions for structural applications where failure is not an option. The steel construction combined with 120,000 psi tensile strength addresses the fundamental need for load-bearing capacity in construction, bridgework, and heavy machinery assembly. The coarse UNC threads provide superior resistance to vibration loosening, while the partially threaded design ensures optimal clamp load distribution. With external hex drive compatibility, installation teams can achieve proper torque values efficiently, reducing labor time while maintaining structural integrity. These heavy-duty fasteners solve the critical challenge of maintaining joint integrity under dynamic loads and environmental stresses.
Specification Summary & Compliance
This 3/4"-10 hex head screw features precise Class 2A thread fit per UNC standards with inch system measurements throughout. Manufacturing complies with ASME B18.2.6, ASTM A325, and ASTM F3125 specifications for structural fasteners. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for hazardous substances. Threading is right-hand direction with coarse spacing, and the fastener maintains Grade A325 mechanical properties including specified hardness and tensile strength values.
