S-91253A673 7/16"-14 x 1 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
• Superior holding power from 130,000 psi tensile strength and Rockwell C39 hardness
• Precise thread engagement with Class 3A fit for reliable fastening in demanding applications
• Easy installation with 1/4" hex drive and standard 82° countersink for flush mounting
• Full-threaded design provides maximum grip along the entire 1-1/2" length
• Coarse UNC threading ensures quick assembly and reduced cross-threading risks
• Regulatory compliance meets ASME B18.3, ASTM F835, RoHS 3, and REACH standards

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 7/16"-14 UNC flat head screws deliver exceptional performance where vibration resistance and long-term reliability are critical. The black-oxide alloy steel construction provides superior protection against corrosion while maintaining high tensile strength for heavy-duty fastening. The Class 3A thread fit ensures precise engagement in machinery, structural assemblies, and equipment where vibration loosening must be prevented. The 82° countersink angle and flat head design create seamless flush mounting in industrial machinery, automotive components, and construction applications, while the hex drive allows for high-torque installation without slippage.

Specification Summary & Compliance

These fully threaded flat head screws feature 7/16"-14 UNC coarse threads with Class 3A precision fit for superior thread engagement. Manufacturing complies with ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance reliability. The products are RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting current environmental and safety regulations for industrial use worldwide.