S-91266A712 1/2"-13 x 1" ASTM F835 Alloy Steel Thread-Locking Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with Nylon Patch thread locker ensures secure fastening in high-stress environments, maintaining integrity from -65° to 250°F.
• Exceptional tensile strength of 130,000 psi provides reliable load-bearing capacity for heavy-duty industrial assemblies.
• Precise Class 3A thread fit delivers superior engagement and reduced risk of cross-threading in critical applications.
• Corrosion-resistant Black-Oxide finish on Alloy Steel enhances durability and extends service life in harsh conditions.
• Efficient hex drive design with 5/16" drive size allows for high-torque installation and easy maintenance access.
• Standard 82° countersink angle enables flush mounting for streamlined surfaces and improved safety.
• Full threading ensures consistent clamping force along the entire 1" length for uniform stress distribution.

Professional Applications & Engineering Value

Engineered for demanding industrial settings, this 1/2"-13 UNC flat head hex screw addresses common challenges like vibration loosening and material fatigue. The Black-Oxide Alloy Steel construction, combined with a Rockwell C39 hardness rating, resists wear and deformation under repetitive loads. Its coarse thread spacing and Class 3A thread fit facilitate quick assembly in machinery, automotive, and structural frameworks, while the Nylon Patch thread locker eliminates the need for additional adhesives. The flat head profile with an 82° countersink ensures a seamless finish, reducing snag risks in conveyor systems or exposed equipment.

Specification Summary & Compliance

This screw features a 1/2"-13 UNC thread with Class 3A fit for precise tolerance, fully threaded design, and coarse thread spacing. It meets ASTM F835 specifications for mechanical properties and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in regulated industries.