S-91255A623 3/8"-16 x 7/8" 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 ensures reliable performance in high-stress industrial applications
- Superior thread precision with Class 3A fit provides secure fastening and vibration resistance
- Black-oxide coating on alloy steel offers enhanced corrosion protection for extended service life
- Rounded button head design combines aesthetic appeal with reduced snagging in tight spaces
- 7/32" hex drive enables efficient installation with standard tools while preventing cam-out
- Full threading along the entire 7/8" length allows for maximum engagement and adjustment flexibility
- Rockwell C39 hardness maintains structural integrity under repeated loading and harsh conditions
Professional Applications & Engineering Value
These black-oxide alloy steel rounded head hex screws with 3/8"-16 UNC coarse threading are engineered to address critical fastening challenges in demanding environments. The combination of high tensile strength and Class 3A thread fit ensures vibration-resistant connections in machinery, heavy equipment, and structural assemblies. The black-oxide surface treatment provides essential corrosion resistance without compromising dimensional accuracy, while the rounded button head profile offers a flush finish that minimizes protrusion risks. Ideal for automotive, manufacturing, and construction applications where reliable fastening performance and regulatory compliance are paramount, these screws deliver consistent results in high-cycle production environments.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse thread spacing for optimal engagement. These 7/8" fully threaded screws maintain strict dimensional compliance with ASME B18.3 and ASTM F835 specifications. The product meets critical environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance, ensuring suitability for global industrial applications while maintaining the specified 120,000 psi tensile strength and Rockwell C39 hardness parameters.
