S-91266A258 10-32 x 1 1/4" 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
- Permanent vibration resistance with nylon patch thread locking that maintains secure fastening in high-stress environments
- Superior corrosion protection through black-oxide coating on alloy steel, extending service life in industrial conditions
- Exceptional load-bearing capacity with 130,000 psi tensile strength and Rockwell C39 hardness for demanding applications
- Precise thread engagement with Class 3A fine UNF threading ensuring reliable, vibration-resistant connections
- Easy installation and removal using standard 1/8" hex drive while maintaining low-profile flat head design
- Wide temperature tolerance from -65° to 250°F, suitable for diverse operating environments
- Full compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for quality and environmental safety
Professional Applications & Engineering Value
These 10-32 UNF flat head screws with nylon patch locking provide critical vibration resistance in machinery, automotive, and electronic assemblies where loosening under dynamic loads poses reliability risks. The black-oxide alloy steel construction delivers exceptional strength-to-weight ratio while resisting corrosion in industrial atmospheres. With Class 3A fine threading and hex drive design, installers achieve precise torque application and flush mounting in countersunk applications. The permanent thread locker maintains clamping force through thermal cycling from -65° to 250°F, eliminating the need for secondary locking mechanisms and reducing assembly time in production environments.
Specification Summary & Compliance
Manufactured to Class 3A thread fit tolerances with UNF fine threading (10-32) and 82° countersink angle. Fully compliant with ASTM F835 specifications for mechanical properties, RoHS 3 (2015/863/EU) for hazardous substance restrictions, and REACH (EC 1907/2006) for chemical safety. Thread locker performance validated across specified temperature range of -65° to 250°F.
