S-91571A428 3/4"-10 x 4 3/4" 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 Grade A325 certification, ensuring reliable performance in heavy-load applications
- Superior tensile strength rated at 120,000 psi for maximum resistance to breaking under extreme stress
- Enhanced durability from Rockwell C19 hardness, providing excellent wear resistance and long service life
- Optimized thread engagement with UNC coarse threading and Class 2A fit, enabling faster assembly and reduced cross-threading risks
- Secure external hex drive design allows for high-torque installation with standard tools, improving installation efficiency
- Partial threading with 1 3/8" thread length and 3 3/8" grip length ensures precise clamping force distribution in structural connections
- Full regulatory compliance with RoHS 3 and REACH standards, making them suitable for global industrial and construction projects
Professional Applications & Engineering Value
Engineered for structural steel connections, these Grade A325 hex head screws deliver critical performance in bridge construction, building frameworks, and heavy machinery assembly. The steel construction combined with UNC coarse threading provides superior vibration resistance, preventing loosening in dynamic environments. The partially threaded design concentrates clamping force precisely where needed, eliminating joint slippage while the external hex drive enables rapid installation with common industrial tools. Meeting ASME B18.2.6 and ASTM standards, these structural bolts solve engineering challenges requiring both high tensile strength and reliable, repeatable fastening performance in demanding applications.
Specification Summary & Compliance
This 3/4"-10 hex head screw features Class 2A thread fit precision with UNC coarse threading and complies with ASME B18.2.6, ASTM A325, and ASTM F3125 manufacturing specifications. The fastener demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for international industrial projects requiring verified material safety and performance standards.
