S-91266A252 10-32 x 1/2" ASTM F835 Alloy Steel Thread-Locking Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Secure vibration-resistant locking with permanent nylon patch thread locker that maintains integrity across temperature fluctuations from -65° to 250°F
• Superior tensile strength of 130,000 psi ensures reliable performance in high-stress industrial applications
• Precision Class 3A thread fit provides consistent engagement and reduces cross-threading risks during installation
• Corrosion-resistant black-oxide finish on alloy steel substrate extends service life in demanding environments
• Optimized 82° countersink angle enables flush mounting with standard countersunk surfaces
• Full threading along the 1/2" length maximizes grip strength and distributes load evenly
• Comprehensive compliance with ASTM F835, RoHS 3, and REACH ensures regulatory acceptance for global supply chains

Professional Applications & Engineering Value

Engineered for critical assembly applications where vibration resistance and precise fit are paramount, these 10-32 UNF flat head screws with nylon patch locking technology solve common industrial fastening challenges. The black-oxide alloy steel construction provides excellent durability while the Class 3A fine threading ensures secure mating with corresponding UNF nuts and tapped holes. Ideal for machinery, electronic enclosures, and automotive components, these fully threaded screws maintain clamping force under dynamic loads. The hex drive design facilitates efficient installation in confined spaces, making them particularly valuable for maintenance and production lines where reliability cannot be compromised.

Specification Summary & Compliance

These screws feature precision Class 3A thread fit with 10-32 UNF fine threading and comply with ASTM F835 manufacturing specifications. The 82° countersink angle matches standard chamfered holes while the Rockwell C39 hardness ensures optimal durability. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, making them suitable for international industrial applications.