S-90275A733 1/2"-13 x 5" ASME B18.6.3 Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc-plated steel construction for extended service life in harsh industrial environments
• High tensile strength rating of 60,000 psi ensures reliable performance in demanding structural applications
• Precision Class 2A thread fit provides consistent engagement and reduces cross-threading during installation
• 82° countersink angle allows for flush mounting with standard countersunk holes for clean, professional finishes
• Partially threaded design offers optimal clamping force while minimizing material stress concentration
• Rockwell B70 hardness maintains thread integrity and prevents stripping under repeated use
• Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures regulatory acceptance across industries

Professional Applications & Engineering Value

These zinc-plated steel flat head screws with 1/2"-13 UNC coarse threading are engineered to solve critical fastening challenges in heavy-duty industrial and construction applications. The combination of 60,000 psi tensile strength and Rockwell B70 hardness provides exceptional resistance to vibrational loosening and structural fatigue, while the zinc plating creates a durable barrier against moisture and chemical exposure. The partially threaded configuration concentrates clamping force precisely where needed, preventing joint slippage in wood, metal, and composite materials. With their standard 82° countersink and slotted drive, these ASME B18.6.3 compliant screws deliver reliable performance in machinery assembly, structural framing, and equipment manufacturing where flush mounting and corrosion resistance are paramount.

Specification Summary & Compliance

This 5" length flat head screw features 1/2"-13 UNC coarse threads with Class 2A thread fit tolerance for precise engagement. Manufacturing conforms to ASME B18.6.3 specifications for dimensional accuracy and performance standards. The product is fully compliant with RoHS 3 (2015/863/EU) restrictions on hazardous substances and REACH (EC 1907/2006) regulations for chemical safety, making it suitable for use across regulated industries and international markets.