S-90058A546 1/4"-20 x 1 1/2" Tamper-Resistant Tri-Groove-Drive Steel Round Head Screws
Tamper-Resistant Tri-Groove-Drive Steel Round Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
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Key Features & Benefits at a Glance
- Superior corrosion protection with zinc-plated steel construction for extended service life in harsh industrial environments
- Exceptional tensile strength rated at 80,000 psi ensures reliable performance under heavy loads and vibration
- Precision Class 3A thread fit provides tighter tolerances for secure fastening and reduced risk of loosening
- Optimized Tri-Groove drive system delivers superior torque transmission and reduced cam-out during installation
- High rounded head profile offers improved clearance and aesthetic finish for professional applications
- Full threading along 1-1/2" length enables maximum grip range and versatile installation options
- Rockwell C28 hardness rating maintains structural integrity and resistance to deformation under stress
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these zinc-plated steel screws combine corrosion resistance with mechanical excellence. The Class 3A UNC coarse threads ensure rapid installation and secure holding power in metal assemblies, machinery, and structural frameworks. The Tri-Groove drive system addresses common installation challenges by minimizing strip-out while maximizing torque transfer. With 80,000 psi tensile strength and fully threaded design, these rounded head screws provide consistent performance in vibration-prone environments where fastener integrity is critical. Ideal for OEM manufacturing, maintenance operations, and heavy equipment where reliable fastening performance is non-negotiable.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC coarse thread spacing. Complies with ASME/ANSI specifications for inch-series fasteners. The zinc-plated surface treatment meets industrial corrosion protection requirements, while the material composition conforms to RoHS and REACH environmental standards. All dimensions including 1/4"-20 thread size, 1-1/2" length, and 3/8" head diameter maintain consistent manufacturing tolerances for reliable interchangeability.
