S-91266A196 8-32 x 5/8" 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
- Permanent vibration resistance with nylon patch thread locker that maintains secure fastening from -65° to 250°F
- Superior strength and durability from alloy steel construction with 130,000 psi tensile strength and Rockwell C39 hardness
- Precise thread engagement with UNC Class 3A fit ensuring reliable performance in demanding applications
- Corrosion-resistant black-oxide finish providing enhanced protection in industrial environments
- Easy installation and removal with standard 3/32" hex drive and flat head design for flush mounting
- Versatile coarse threading (8-32 UNC) offering excellent holding power in various materials
- Full thread coverage along the 5/8" length for maximum grip and load distribution
Professional Applications & Engineering Value
These black-oxide alloy steel flat head screws with nylon patch thread locking technology solve critical vibration-induced loosening problems in industrial applications. The permanent thread locker maintains clamping force through thermal cycles from -65° to 250°F, making them ideal for machinery, automotive assemblies, and electronic enclosures where temperature fluctuations occur. The Class 3A thread fit ensures precise engagement with mating components, while the 82° countersink angle provides flush mounting in precision applications. The combination of 130,000 psi tensile strength and fully threaded design delivers reliable performance in high-stress environments where fastener failure is not an option.
Specification Summary & Compliance
This 8-32 x 5/8" flat head screw features UNC coarse threading with Class 3A fit for precision engagement. Manufactured to ASTM F835 specifications with complete compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The screw maintains dimensional accuracy with 0.164" thread diameter, 0.359" head diameter, and standard 82° countersink angle, ensuring consistent performance across industrial applications.
