S-91255A636 3/8"-16 x 2 3/4" 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 load-bearing capability with 120,000 psi tensile strength for reliable performance in demanding applications
- Superior corrosion resistance provided by black-oxide coating on alloy steel, extending service life in harsh environments
- Precision thread engagement with Class 3A UNC coarse threads ensuring secure, vibration-resistant connections
- Optimized drive efficiency through 7/32" hex drive design enabling high-torque installation without stripping
- Enhanced durability from Rockwell C39 hardness maintaining structural integrity under repeated stress
- Full-threaded design delivering maximum grip length and uniform stress distribution along the entire fastener
- Regulatory compliance assurance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These black-oxide alloy steel rounded head hex screws provide critical solutions for industrial assembly challenges where vibration resistance and long-term reliability are paramount. The Class 3A UNC coarse thread configuration prevents cross-threading during high-speed assembly while maintaining secure fastening in machinery, structural frameworks, and heavy equipment. The fully threaded design ensures consistent clamping force across the entire 2 3/4" length, eliminating weak points in critical joints. With 120,000 psi tensile strength and corrosion-resistant coating, these fasteners withstand extreme operational stresses in manufacturing, construction, and automotive applications where fastener failure is not an option.
Specification Summary & Compliance
Manufactured to precise Class 3A thread fit tolerances with 3/8"-16 UNC coarse spacing threads. Complies with ASME B18.3 dimensional specifications and ASTM F835 mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. Features 0.656" head diameter with standard rounded button head profile and 7/32" hex drive configuration for standardized tool compatibility.
