S-91263A521 8-32 x 1/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel 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
- Superior corrosion resistance with zinc-plated alloy steel construction for extended service life in demanding environments
- Exceptional holding power with 130,000 psi tensile strength and Rockwell C39 hardness for reliable fastening in high-stress applications
- Precision thread engagement with Class 3A thread fit ensuring secure, vibration-resistant connections
- Optimized flush mounting featuring undercut flat head design with 82° countersink angle for clean, professional finishes
- Enhanced installation efficiency with hex drive (3/32") allowing high-torque application without cam-out
- Full-thread coverage along the 1/4" length provides maximum grip and load distribution
- Regulatory compliance assurance meeting ASTM F835, RoHS 3, and REACH standards for global industrial use
Professional Applications & Engineering Value
These 8-32 UNC flat head screws deliver critical engineering solutions where flush surface mounting and high-strength fastening are paramount. The zinc-plated alloy steel construction provides essential corrosion protection for industrial equipment, machinery assemblies, and electronic enclosures exposed to harsh conditions. The undercut flat head profile with 82° countersink angle ensures precise seating without protrusion, while the coarse UNC threading and Class 3A thread fit create vibration-resistant connections in materials where fine threads might strip. The fully threaded design maximizes engagement depth, making these industrial screws ideal for applications requiring consistent clamping force across the entire fastener length.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit for superior tolerance control. These 8-32 UNC flat head screws feature coarse thread spacing and right-hand threading in compliance with ASTM F835 manufacturing specifications. Full regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring suitability for global industrial applications requiring restricted substance control.
