S-91306A371 1/4"-20 x 1/4" ASTM F835 Steel Button Head Hex-Drive Screws
Steel Button Head Hex-Drive Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional corrosion resistance with zinc plating protecting against rust in demanding industrial environments
- Superior thread engagement with Class 3A thread fit ensuring precise, vibration-resistant fastening
- High-torque installation capability through 5/32" hex drive design for secure assembly without stripping
- Optimal strength-to-weight ratio with alloy steel construction supporting 120,000 psi tensile strength
- Enhanced durability with Rockwell C39 hardness maintaining structural integrity under heavy loads
- Reliable coarse threading with UNC 1/4"-20 threads providing quick installation and superior holding power
- Comprehensive regulatory compliance meeting ASME B18.3, ASTM F835, RoHS 3, and REACH standards
Professional Applications & Engineering Value
These zinc-plated alloy steel rounded head screws deliver critical performance in industrial settings where vibration resistance and corrosion protection are paramount. The Class 3A thread fit ensures precise mating with components, eliminating play and maintaining alignment in machinery, automotive assemblies, and structural frameworks. The fully threaded design with coarse UNC spacing allows for rapid installation while providing maximum thread engagement throughout the fastener length. The rounded button head profile combined with hex drive functionality creates a low-profile fastener that withstands high torque applications without compromising aesthetics or creating snag points. Engineered for heavy-duty industrial applications, these screws maintain integrity in environments subject to dynamic loads, temperature variations, and exposure to harsh conditions.
Specification Summary & Compliance
Manufactured to precise Class 3A thread fit tolerances with UNC 1/4"-20 coarse thread spacing and right-hand threading. Compliant with ASME B18.3 dimensional specifications and ASTM F835 mechanical requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for restricted substances. Features fully threaded construction with standardized rounded button head profile and 5/32" hex drive configuration.
