S-90275A540 1/4"-20 x 3/4" ASME B18.6.3 Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc plating for reliable performance in industrial environments
• Superior holding power from 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Secure flush mounting with standard 82° countersink angle and flat head design
• Quick installation and removal using standard slotted drive tools
• Reliable thread engagement with Class 2A fit and coarse UNC threading for vibration resistance
• Full-length threading ensures maximum grip along the entire 3/4" length
• Regulatory compliance meets ASME B18.6.3, RoHS 3, and REACH standards for global acceptance

Professional Applications & Engineering Value

This zinc-plated steel flat head screw delivers exceptional engineering value in industrial fastening applications where flush surface mounting and high tensile strength are critical. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in heavy-duty assemblies, while the zinc plating provides essential corrosion protection for machinery, equipment, and structural components. The 1/4"-20 UNC coarse threading with Class 2A fit offers superior resistance to vibration loosening, making these slotted flat head screws ideal for manufacturing, automotive, and construction applications where durability and precise flush installation are paramount requirements.

Specification Summary & Compliance

This 1/4"-20 x 3/4" flat head screw features Class 2A thread fit with UNC coarse threading and 82° countersink angle. Manufactured to ASME B18.6.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring quality and safety standards for industrial use.