S-90275A726 1/2"-13 x 3 1/2" ASME B18.6.3 Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• High tensile strength of 60,000 psi ensures reliable fastening under heavy loads and vibration
• Rockwell B70 hardness provides excellent wear resistance and durability for repeated use
• Class 2A thread fit with UNC coarse spacing enables quick assembly and reduces cross-threading risks
• 82° countersink angle and standard flat head profile allows for flush mounting in various materials
• Partial threading design offers optimal grip strength while minimizing material stress
• Compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality consistency and environmental safety

Professional Applications & Engineering Value

These 1/2"-13 UNC flat head screws deliver exceptional performance in demanding industrial applications where vibration resistance and structural integrity are critical. The zinc-plated steel construction provides reliable protection against corrosion in manufacturing facilities, outdoor equipment, and machinery assemblies. The coarse thread spacing combined with Class 2A thread fit ensures rapid installation in wood, metal, and composite materials while maintaining secure fastening. The 82° countersink angle and slotted drive design facilitate flush mounting in countersunk holes, making them ideal for applications requiring smooth surface finishes. With partial threading and 3 1/2" length, these screws provide superior clamping force distribution, preventing joint failure in heavy-duty construction, automotive, and industrial machinery applications.

Specification Summary & Compliance

This product features precise Class 2A thread fit with UNC coarse thread spacing (1/2"-13) and right-hand threading. Manufacturing specifications comply with ASME B18.6.3 standards for dimensional accuracy and performance. The screws meet RoHS 3 (2015/863/EU) compliance for hazardous substance restrictions and REACH (EC 1907/2006) requirements for chemical safety. Additional specifications include Rockwell B70 hardness, 82° countersink angle, and 0.5" thread diameter with 1 1/2" minimum thread length.