S-91255A008 0-80 x 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
- Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
- Superior thread engagement and vibration resistance due to Class 3A fit and UNF fine threading
- High-strength fastening for demanding applications with 120,000 psi tensile strength and Rockwell C39 hardness
- Easy installation and removal with hex drive design providing reliable torque transfer
- Full thread coverage for maximum grip across the entire 1/2" length
- Reliable compliance with industry standards including ASME B18.3 and ASTM F835 specifications
- Environmentally responsible manufacturing with RoHS 3 and REACH compliance
Professional Applications & Engineering Value
These 0-80 UNF fine thread screws with black-oxide alloy steel construction deliver critical performance in precision assemblies where vibration resistance and corrosion protection are paramount. The Class 3A thread fit ensures tighter tolerances than standard fasteners, preventing loosening in machinery, electronic enclosures, and automotive components. The combination of 120,000 psi tensile strength and Rockwell C39 hardness provides exceptional durability against mechanical stress, while the hex drive and rounded button head design facilitate secure installation in confined spaces. These fully threaded screws maintain consistent clamping force across the entire engagement length, making them ideal for critical joints in manufacturing equipment, aerospace assemblies, and high-performance mechanical systems.
Specification Summary & Compliance
Manufactured to precise Class 3A thread fit standards with UNF fine threading (0-80 size) and right-hand thread direction. Complies with ASME B18.3 and ASTM F835 specifications for dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance requirements. Features fully threaded 1/2" length with consistent 0.06" thread diameter and standard rounded head profile.
