S-91266A253 10-32 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
- Vibration-resistant locking with permanent nylon patch that maintains secure fastening in high-stress environments
- Exceptional tensile strength of 130,000 psi ensures reliable performance in demanding industrial applications
- Temperature stability from -65° to 250°F for consistent performance across extreme operating conditions
- Precision Class 3A thread fit provides superior engagement and reduces the risk of cross-threading during installation
- Corrosion-resistant black-oxide finish on alloy steel extends service life in challenging environments
- Full threading design allows for maximum adjustability and secure fastening throughout the entire length
- Hex drive compatibility with 1/8" drive for efficient installation and removal with standard tools
Professional Applications & Engineering Value
These 10-32 UNF flat head screws with nylon patch locking technology provide critical vibration resistance in machinery, automotive assemblies, and electronic enclosures where loosening under dynamic loads is a primary concern. The black-oxide alloy steel construction combined with Class 3A thread precision ensures reliable performance in high-vibration industrial environments. The 82° countersink angle creates a flush mounting surface while the fully threaded design maximizes engagement in thin materials. Engineered to withstand temperature fluctuations from -65° to 250°F, these hex drive screws maintain their locking properties across diverse operating conditions, making them ideal for aerospace, manufacturing, and heavy equipment applications where fastener integrity is paramount.
Specification Summary & Compliance
This 10-32 UNF flat head screw features precision Class 3A thread fit with fine threading and right-hand direction. Manufactured to ASTM F835 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The product meets rigorous industrial requirements with Rockwell C39 hardness and maintains dimensional accuracy throughout its 5/8" length with standard flat head profile and hex drive configuration.
