S-91306A265 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 tensile strength of 120,000 psi ensures reliable performance in demanding applications, reducing the risk of fastener failure.
- Superior corrosion resistance from zinc plating extends service life in harsh industrial environments, minimizing maintenance needs.
- Precise Class 3A thread fit provides secure, vibration-resistant connections, enhancing assembly integrity.
- High hardness rating (Rockwell C39) offers excellent wear resistance, maintaining thread integrity through repeated use.
- Convenient hex drive design allows for easy installation and removal with standard tools, speeding up assembly processes.
- Full threading ensures maximum grip along the entire length, providing uniform clamping force.
- Compliance with major standards including ASME B18.3 and ASTM F835 guarantees consistent quality and interoperability.
Professional Applications & Engineering Value
These 8-32 UNC coarse thread screws are engineered to address critical challenges in industrial fastening, where vibration loosening and material fatigue are common concerns. The zinc-plated alloy steel construction provides a durable barrier against corrosion, making them ideal for outdoor equipment, machinery, and automotive assemblies exposed to moisture. The Class 3A thread fit and coarse threading ensure quick installation and high resistance to vibrational loosening, reducing downtime in production lines. With a rounded button head and hex drive, they offer a low-profile, secure fastening solution for enclosures, brackets, and structural components where reliability is paramount. Their full threading distributes load evenly, preventing stress concentration and extending the life of assembled parts.
Specification Summary & Compliance
These screws feature a Class 3A thread fit per UNC standards, ensuring tight tolerances for secure fastening. They are manufactured in compliance with ASME B18.3 and ASTM F835 specifications, guaranteeing dimensional accuracy and performance consistency. Additionally, they meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for use in regulated industries without hazardous substance concerns.
