S-91236A849 3/4"-10 x 3 1/2" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength 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
- Superior corrosion resistance with zinc plating for extended service life in demanding environments
- High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
- Rockwell B69 hardness provides excellent durability and resistance to wear and deformation
- Coarse UNC threads offer faster installation and superior performance in softer materials
- External hex drive with 1 1/8" head width delivers secure tool engagement and high torque capability
- Class 2A thread fit guarantees consistent quality and easy assembly in industrial applications
- Partially threaded design provides optimal clamping force distribution and vibration resistance
Professional Applications & Engineering Value
This 3/4"-10 UNC hex head screw delivers exceptional engineering value for heavy-duty industrial applications requiring reliable fastening solutions. The high-strength steel construction combined with zinc plating addresses critical concerns about corrosion and environmental degradation in manufacturing, construction, and machinery assembly. The coarse thread design ensures superior performance in materials where fine threads might strip or fail, while the external hex drive provides maximum torque transmission for secure installations. With its partially threaded configuration, this fastener offers precise clamping control, making it ideal for structural connections, equipment mounting, and other applications where vibration resistance and long-term reliability are paramount.
Specification Summary & Compliance
This hex head screw features precise Class 2A thread fit with 3/4"-10 UNC coarse threads and meets ASME B18.2.1 manufacturing specifications. The fastener maintains dimensional accuracy with a 3 1/2" length and 1 3/4" minimum thread length. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for global industrial markets, while the material conforms to ASTM A307 standards for carbon steel bolts and studs.
