S-91266A622 3/8"-16 x 3/4" 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 nylon patch technology maintains secure fastening in high-stress environments
- Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads
- Corrosion-resistant black-oxide finish on alloy steel provides enhanced durability in industrial settings
- Precision Class 3A thread fit delivers superior engagement and consistent torque performance
- Wide temperature tolerance from -65° to 250°F ensures stable performance across diverse operating conditions
- Standard 82° countersink angle allows for flush mounting in various applications
- Hex drive design with 7/32" drive size enables efficient installation and removal
Professional Applications & Engineering Value
These 3/8"-16 UNC nylon patch locking flat head screws are engineered to solve critical vibration-induced loosening challenges in industrial assemblies. The black-oxide alloy steel construction combined with Class 3A thread fit ensures precise engagement and reliable performance in machinery, equipment manufacturing, and structural applications where vibration resistance is paramount. The nylon patch locking technology creates consistent friction that prevents back-out without damaging threads, making these flat head screws ideal for permanent installations requiring maintenance-free operation. With their fully threaded coarse pitch design and 82° countersink profile, they provide excellent holding power in metal-to-metal fastening applications across automotive, industrial machinery, and heavy equipment sectors.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit standards with UNC coarse threading and precise dimensional control. These screws comply with ASTM F835 specifications for mechanical properties and performance. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. The black-oxide surface treatment provides consistent corrosion protection while maintaining the 130,000 psi tensile strength and Rockwell C39 hardness required for demanding industrial applications.
