S-91306A293 3/8"-16 x 1 3/4" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated alloy steel construction, ideal for harsh industrial environments
• Exceptional tensile strength (120,000 psi) ensures reliable, heavy-duty fastening under high-stress conditions
• Precise Class 3A thread fit guarantees secure engagement and vibration resistance in critical assemblies
• Easy installation and removal with 7/32" hex drive and rounded button head design
• Full threading along the 1 3/4" length provides maximum grip and load distribution
• High hardness (Rockwell C39) reduces wear and extends service life in demanding applications
• Compliance with major industry standards including ASME B18.3 and ASTM F835 for assured quality and safety

Professional Applications & Engineering Value

These 3/8"-16 UNC zinc-plated alloy steel rounded head screws are engineered to address common industrial fastening challenges, such as corrosion in outdoor or chemically aggressive settings. The zinc plating offers a durable barrier against rust, while the alloy steel core and Class 3A coarse threading deliver high clamp load and resistance to loosening under dynamic loads. The rounded button head and hex drive facilitate quick assembly in tight spaces, making them ideal for machinery, structural frameworks, and automotive components where high tensile strength and reliable performance are critical. Their fully threaded design ensures uniform stress distribution, reducing the risk of joint failure in heavy-duty industrial applications.

Specification Summary & Compliance

These screws feature a 3/8"-16 UNC coarse thread with Class 3A fit for precise dimensional accuracy, manufactured to meet ASME B18.3 and ASTM F835 specifications. They are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability for global industrial use.