S-91266A241 10-24 x 1/4" 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 maintains secure fastening from -65° to 250°F
• Exceptional tensile strength of 130,000 psi prevents stripping and failure in high-stress applications
• Corrosion-resistant black-oxide coating on alloy steel extends service life in demanding environments
• Precise Class 3A thread fit ensures smooth installation and reliable engagement with mating components
• Hex drive design with 1/8" drive size provides superior torque transmission and prevents cam-out
• Standard 82° countersink angle allows for flush mounting in various industrial applications
• Fully threaded design offers maximum grip length and consistent holding power

Professional Applications & Engineering Value

These 10-24 UNC flat head screws with nylon patch thread locker solve critical vibration-induced loosening problems in industrial machinery, automotive assemblies, and electronic enclosures. The black-oxide alloy steel construction provides superior corrosion resistance while maintaining Rockwell C39 hardness for durability in high-stress environments. The coarse UNC threads with Class 3A fit ensure rapid installation and reliable performance in materials where fine threads might strip. The combination of 130,000 psi tensile strength and vibration-resistant locking makes these hex drive screws ideal for applications requiring permanent, high-strength fastening that withstands thermal cycling and mechanical shock.

Specification Summary & Compliance

Manufactured to exact Class 3A thread fit tolerances with UNC coarse threading and right-hand thread direction. Fully compliant with ASTM F835 specifications for mechanical properties and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards for industrial use. Features standard 82° countersink angle and fully threaded design for consistent performance across applications.