S-91255A045 3/8"-24 x 1 1/2" 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
- Superior corrosion resistance with black-oxide coating, extending service life in harsh industrial environments
- Exceptional mechanical strength with 120,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Precision fine threading with Class 3A fit ensures secure, vibration-resistant fastening in critical assemblies
- Optimized installation efficiency through 7/32" hex drive design providing positive torque transmission
- Enhanced clearance profile with rounded button head design for applications requiring low-profile fasteners
- Full regulatory compliance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH standards for global acceptance
- Complete thread coverage along the 1½" length enables maximum engagement and load distribution
Professional Applications & Engineering Value
These black-oxide alloy steel rounded head screws deliver critical performance advantages in demanding industrial settings where corrosion resistance and high tensile strength are paramount. The 3/8"-24 UNF fine threading with Class 3A precision fit provides superior resistance to vibration loosening in machinery, automotive assemblies, and precision equipment. The combination of 120,000 psi tensile strength and Rockwell C39 hardness ensures reliable performance under extreme mechanical stress, while the 7/32" hex drive facilitates secure installation in confined spaces. The rounded button head profile offers both aesthetic appeal and functional clearance benefits, making these industrial screws ideal for applications requiring both technical performance and clean visual lines.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit ensuring precision tolerance for secure fastening. Complies with ASME B18.3 dimensional specifications and ASTM F835 mechanical requirements. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) standards for hazardous substances. Features UNF fine threading with 24 threads per inch and full threading along the entire 1½" length for maximum engagement strength.
