S-91306A339 8-32 x 3/4" 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 tensile strength of 120,000 psi ensures reliable performance in high-stress industrial applications, reducing the risk of fastener failure.
- Class 3A thread fit provides tighter tolerances for superior engagement and vibration resistance, minimizing loosening in dynamic environments.
- Zinc-plated alloy steel construction offers excellent corrosion resistance, extending service life in harsh or outdoor conditions.
- Fully threaded design maximizes grip and holding power along the entire length, ensuring secure fastening in various material thicknesses.
- Hex drive (3/32") and rounded button head allow for easy installation with standard tools while providing a low-profile, snag-resistant finish.
- Coarse 8-32 UNC threading enables quick assembly and reduced cross-threading risks, improving efficiency in production lines.
- Rockwell C39 hardness enhances durability and wear resistance, maintaining thread integrity through repeated use.
Professional Applications & Engineering Value
Engineered for demanding environments, these zinc-plated alloy steel rounded head screws address common industrial challenges such as vibration-induced loosening and corrosion. The 8-32 UNC coarse thread with Class 3A fit ensures precise alignment and robust clamping force, ideal for machinery, automotive assemblies, and electrical enclosures where reliability is critical. The fully threaded design distributes load evenly, preventing joint failure under heavy loads, while the hex drive facilitates secure tightening in confined spaces. Compliant with ASME B18.3 and ASTM F835, these screws deliver consistent performance in heavy-duty fastening applications, reducing maintenance needs and downtime.
Specification Summary & Compliance
This screw features a 3/4" length with 8-32 UNC coarse threads and Class 3A thread fit for high precision. It meets ASME B18.3 and ASTM F835 manufacturing standards, ensuring dimensional accuracy and reliability. The product is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmental and safety regulations in industrial supply chains.
