S-91266A143 6-32 x 1/4" ASTM F835 Alloy Steel Thread-Locking Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant performance with nylon patch thread locker that maintains secure fastening from -65° to 250°F, preventing loosening in dynamic environments
• Exceptional tensile strength of 130,000 psi ensures reliable load-bearing capacity for demanding industrial applications
• Superior corrosion protection through black-oxide coating on alloy steel, extending service life in various operating conditions
• Precision Class 3A thread fit provides tighter tolerances for improved engagement and reduced risk of cross-threading
• Optimized drive efficiency with 5/64" hex drive that delivers superior torque transmission and prevents cam-out during installation
• Full threading design allows maximum grip length and consistent clamping force across the entire fastener length
• Regulatory compliance assurance meeting ASTM F835 standards while being RoHS 3 and REACH compliant for global market acceptance

Professional Applications & Engineering Value

These 6-32 UNC flat head screws with hex drive configuration are engineered to address critical challenges in industrial assembly where vibration resistance and reliable fastening are paramount. The black-oxide alloy steel construction combined with Rockwell C39 hardness provides exceptional durability against wear and environmental factors. The nylon patch thread locker technology effectively counters vibrational loosening in machinery, automotive, and electronic enclosures, while the coarse UNC threading ensures quick installation and superior holding power in various materials. The flat head design with 82° countersink angle enables flush mounting for applications requiring smooth surface finishes, making these fully threaded screws ideal for precision equipment, manufacturing fixtures, and structural components demanding high-strength, temperature-stable fastening solutions.

Specification Summary & Compliance

This fastener features precision Class 3A thread fit with 6-32 UNC coarse threading and 1/4" length dimensions. Manufacturing complies with ASTM F835 specifications for consistent quality and performance. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, ensuring adherence to international environmental and safety standards for industrial components.