S-90058A146 6-32 x 3/8" Tamper-Resistant Tri-Groove-Drive Steel Round Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc-plated steel construction for long-lasting performance in harsh industrial environments
• Superior thread engagement with Class 3A fit UNC coarse threads ensuring reliable, vibration-resistant fastening connections
• High torque transmission through Tri-Groove drive design preventing cam-out and reducing tool slippage during installation
• Optimized load distribution with rounded head profile reducing surface stress and preventing material damage
• Outstanding mechanical strength with 80,000 psi tensile strength and Rockwell C28 hardness for heavy-duty applications
• Full-threaded design providing maximum grip length and uniform stress distribution along the entire fastener
• Precision dimensional consistency with 0.26" head diameter and 3/8" length ensuring perfect fit in standardized assemblies

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these zinc-plated steel rounded head screws deliver exceptional performance where corrosion resistance and mechanical reliability are critical. The Tri-Groove drive system eliminates common installation issues by providing superior torque transfer without cam-out, while the UNC coarse threads with Class 3A fit ensure rapid assembly and vibration resistance in machinery, electrical enclosures, and automotive components. The rounded head design distributes clamping force evenly, preventing surface damage in sensitive materials. With 80,000 psi tensile strength and Rockwell C28 hardness, these fully threaded fasteners maintain integrity under extreme loads, making them ideal for structural applications requiring repeated disassembly and reassembly cycles.

Specification Summary & Compliance

Manufactured to precise inch system standards with Class 3A thread fit tolerance for superior engagement. Features UNC coarse threads (6-32) with right-hand threading direction and fully threaded shank. Complies with industry standards for dimensional accuracy including head diameter (0.26"), head height (0.12"), and overall length (3/8"). The zinc-plated steel construction meets corrosion protection requirements while maintaining Rockwell C28 hardness and 80,000 psi tensile strength specifications. Suitable for applications requiring reliable fastening performance in industrial and commercial settings.