S-91255A001 0-80 x 3/8" ASTM F835 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive 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 tensile strength of 120,000 psi for reliable performance in demanding applications
- Superior corrosion resistance with black-oxide coating on alloy steel, extending service life
- Precise Class 3A thread fit ensures secure fastening and vibration resistance in fine-thread assemblies
- Optimized torque transmission through hex drive design for efficient installation and removal
- Rounded button head profile provides a low-profile, aesthetically clean finish while minimizing snagging
- Full threading along the 3/8" length offers maximum grip and adjustment flexibility
- Compliance with major industry standards including ASME B18.3 and ASTM F835 for guaranteed quality and interoperability
Professional Applications & Engineering Value
This 0-80 UNF fine thread screw with black-oxide alloy steel construction addresses critical needs in precision engineering and industrial maintenance. The combination of Rockwell C39 hardness and 120,000 psi tensile strength ensures durability under high-stress conditions, preventing stripping and failure in machinery, electronics, and automotive assemblies. The fully threaded design and Class 3A fit provide superior clamp load distribution and vibration resistance, essential for fine-pitch applications where loosening could lead to operational downtime. The hex drive allows for high-torque installation without cam-out, while the rounded head reduces surface protrusion in confined spaces. Ideal for precision equipment, jigs, and fixtures, this screw delivers consistent performance where dimensional accuracy and reliability are paramount.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit tolerances per UNF fine thread standards, this screw ensures precise engagement and repeatability. It conforms to ASME B18.3 and ASTM F835 specifications for dimensional consistency and mechanical properties. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial use worldwide.
