S-91253A361 3/8"-24 x 1 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat 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 corrosion resistance with black-oxide coating, ideal for harsh industrial environments
- Superior tensile strength (130,000 psi) ensures reliable performance under high-stress applications
- Precision Class 3A thread fit provides secure, vibration-resistant fastening in critical assemblies
- 82° countersink angle allows for flush mounting with standard countersunk holes
- Full threading along 1 3/4" length enables maximum grip and adjustment flexibility
- Hex drive (7/32") design facilitates easy installation with standard tools while preventing cam-out
- Compliance with ASTM F835, RoHS 3, and REACH guarantees material quality and environmental safety
Professional Applications & Engineering Value
These black-oxide alloy steel flat head screws with 3/8"-24 UNF fine threads are engineered to address critical fastening challenges in industrial equipment, machinery, and structural applications. The combination of Rockwell C39 hardness and 130,000 psi tensile strength provides exceptional resistance to shear forces and vibration loosening, while the black-oxide surface treatment offers superior corrosion protection in demanding environments. The 82° countersink angle ensures seamless flush mounting in precision components, making these fully threaded screws ideal for applications requiring both high strength and aesthetic finish. The hex drive configuration allows for efficient installation in confined spaces, reducing assembly time while maintaining torque integrity.
Specification Summary & Compliance
This flat head screw features precision Class 3A thread fit with 3/8"-24 UNF fine threads and right-hand threading direction. Manufacturing complies with ASTM F835 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
