S-91263A614 1/2"-13 x 3" 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 plating that protects against rust in demanding industrial environments
- Exceptional tensile strength of 130,000 psi ensures reliable performance in high-stress applications
- Precise Class 3A thread fit provides superior engagement and vibration resistance in critical assemblies
- Optimized 82° countersink angle allows for flush mounting in standard countersunk holes
- Rockwell C39 hardness rating delivers excellent wear resistance and durability over extended service life
- 5/16" hex drive design enables secure installation with standard tools and prevents stripping
- Comprehensive compliance with ASTM F835, RoHS 3, and REACH standards ensures regulatory acceptance
Professional Applications & Engineering Value
These zinc-plated alloy steel flat head screws deliver critical performance advantages for industrial applications where vibration resistance and corrosion protection are paramount. The 1/2"-13 UNC coarse thread configuration provides excellent holding power in metals and plastics, while the Class 3A thread fit ensures precise engagement that minimizes loosening in high-vibration environments. The partially threaded design concentrates clamping force exactly where needed, making these flat head screws ideal for machinery, structural assemblies, and heavy equipment where flush mounting is required. The combination of 130,000 psi tensile strength and Rockwell C39 hardness provides exceptional durability against shear forces and repeated stress cycles.
Specification Summary & Compliance
This 3" length flat head screw features precise Class 3A thread fit with 1/2"-13 UNC coarse threading and 82° countersink angle for standard applications. Manufacturing complies with ASTM F835 specifications for dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets.
