S-91255A059 5/8"-18 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 finish, extending service life in harsh industrial environments.
- Exceptional tensile strength of 120,000 psi ensures reliable performance under high-stress and heavy-duty applications.
- Precision Class 3A thread fit guarantees secure, vibration-resistant fastening with minimal risk of loosening.
- 3/8" hex drive design allows for high-torque installation and easy removal with standard tools.
- Fully threaded shank provides consistent holding power along the entire 1-1/2" length for uniform load distribution.
- Hardened to Rockwell C37 for excellent wear resistance and durability against mechanical fatigue.
- Compliance with ASME B18.3 and ASTM F835 ensures consistent quality and interchangeability in professional assemblies.
Professional Applications & Engineering Value
This black-oxide alloy steel rounded head screw is engineered to address critical challenges in heavy machinery, automotive, and structural applications where vibration resistance and corrosion protection are paramount. The 5/8"-18 UNF fine threading with Class 3A fit minimizes backlash and prevents self-loosening under dynamic loads, while the fully threaded design ensures maximum grip in thick materials. Its high tensile strength and Rockwell C37 hardness make it ideal for demanding environments, reducing maintenance frequency and enhancing operational reliability. The 3/8" hex drive facilitates quick, secure installation, streamlining assembly processes in industrial settings.
Specification Summary & Compliance
This screw adheres to Class 3A thread tolerance per UNF standards, ensuring precise fit and reliable performance. It meets ASME B18.3 and ASTM F835 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries without hazardous substances.
