S-91255A191 8-32 x 5/16" 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 corrosion resistance with Black-Oxide coating, extending service life in demanding industrial environments
- Superior tensile strength of 120,000 psi ensures reliable performance under high-stress applications without failure
- Precision Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal assembly adjustments
- Hex drive design provides easy installation and high torque transmission, reducing tool slippage and installation time
- Fully threaded construction offers consistent holding power along the entire length for uniform load distribution
- Rockwell C39 hardness maintains structural integrity and resistance to wear in repetitive use scenarios
- Compliance with ASME B18.3, ASTM F835, RoHS 3, and REACH ensures regulatory adherence and safe use across global markets
Professional Applications & Engineering Value
Engineered for heavy-duty industrial applications, this 8-32 UNC thread screw with Black-Oxide alloy steel construction addresses critical challenges in machinery assembly, automotive components, and electronic enclosures. The coarse thread spacing and Class 3A thread fit prevent loosening under vibration, while the rounded button head and hex drive facilitate quick installation in confined spaces. With a tensile strength of 120,000 psi and Rockwell C39 hardness, it withstands extreme mechanical stresses, reducing maintenance frequency and downtime. Ideal for high-torque environments, this screw ensures long-term reliability in corrosive or high-load conditions, supporting efficient production lines and durable end-products.
Specification Summary & Compliance
This screw adheres to Class 3A thread fit for precise dimensional accuracy under UNC thread standards, with a coarse thread spacing and right-hand thread direction. Manufactured in compliance with ASME B18.3 and ASTM F835 specifications, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable use in industrial settings.
