S-91266A194 8-32 x 1/2" ASTM F835 Alloy Steel Thread-Locking Hex Drive Flat Head Screws
Alloy Steel Thread-Locking Hex Drive Flat Head 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
- Vibration-resistant locking with permanent nylon patch thread locker prevents loosening in high-stress applications
- Exceptional tensile strength of 130,000 psi ensures reliable performance in demanding industrial environments
- Wide temperature tolerance from -65° to 250°F maintains fastener integrity across diverse operating conditions
- Precision Class 3A thread fit enables smooth installation and superior engagement in tapped holes
- Corrosion-resistant black-oxide coating on alloy steel provides enhanced durability and professional appearance
- Full UNC coarse threading offers faster installation and reduced risk of cross-threading
- Hex drive design allows for high-torque application and secure fastening in confined spaces
Professional Applications & Engineering Value
These black-oxide alloy steel flat head screws with nylon patch thread locker solve critical vibration-induced loosening problems in industrial machinery, automotive assemblies, and electronic enclosures. The combination of Class 3A UNC threads with coarse spacing ensures rapid installation while maintaining precision fit in demanding applications. The fully threaded design provides maximum grip length, while the 82° countersink angle creates a flush surface finish ideal for aerodynamic and safety-critical components. Engineered for high-strength fastening in environments subject to thermal cycling and mechanical stress, these screws deliver reliable performance where standard fasteners would fail.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit tolerances with UNC coarse threading (8-32 size). Fully compliant with ASTM F835 specifications for mechanical properties and performance. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features right-hand thread direction with standard flat head profile and hex drive compatibility for professional installation tools.
