S-91255A815 10-32 x 2 1/4" 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 corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
- Superior thread precision with Class 3A fit ensures reliable, vibration-resistant fastening in critical applications
- High tensile strength of 120,000 psi provides dependable performance under extreme mechanical stress
- Optimized drive engagement with 1/8" hex drive prevents stripping and enables efficient installation
- Fine UNF threading delivers enhanced clamping force distribution for improved joint integrity
- Rockwell C39 hardness maintains structural integrity through repeated assembly cycles
- Regulatory compliance with RoHS 3 and REACH ensures environmental responsibility and global market acceptance
Professional Applications & Engineering Value
These black-oxide alloy steel rounded head screws with 10-32 UNF fine threading solve critical fastening challenges in precision engineering applications. The combination of Class 3A thread fit and partial threading provides optimal grip strength while preventing cross-threading in automated assembly lines. The button-style rounded head with hex drive offers flush mounting capabilities with superior torque transmission, making them ideal for machinery, automotive components, and electronic enclosures where vibration resistance and corrosion protection are paramount. The 120,000 psi tensile strength ensures reliable performance in high-stress industrial environments, while the black-oxide surface treatment provides consistent protection against oxidation and wear.
Specification Summary & Compliance
Manufactured to ASME B18.3 and ASTM F835 specifications with Class 3A thread fit precision. Features include 10-32 UNF fine threading, 2 1/4" length with 0.88" minimum thread engagement, and right-hand thread direction. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.
