S-92327A813 1/4"-20 x 1 1/2" ASME B18.2.1, SAE J429 Square Head Screws
Square Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional tensile strength of 120,000 psi ensures reliable performance in high-stress applications, reducing the risk of fastener failure
- Superior corrosion resistance from zinc yellow-chromate plating extends service life in harsh industrial environments
- Precise Class 3A thread fit provides consistent engagement and vibration resistance in assembled components
- External square drive design allows for high-torque installation with standard tools, minimizing stripping and improving efficiency
- SAE Grade 5 certification guarantees consistent mechanical properties and quality assurance for critical applications
- Fully threaded UNC coarse configuration enables faster installation and superior holding power across the entire fastener length
- Rockwell C25 hardness rating maintains thread integrity and prevents deformation under heavy loads
Professional Applications & Engineering Value
These SAE Grade 5 square head screws deliver critical engineering solutions where vibration resistance, high tensile strength, and corrosion protection are paramount. The combination of steel construction with zinc yellow-chromate plating addresses common industrial challenges including environmental exposure and chemical degradation. The external square drive and UNC coarse threading provide exceptional installation efficiency in heavy machinery, construction equipment, and structural assemblies where rapid disassembly may be required. With 1/4"-20 thread size and 1-1/2" length, these fasteners offer optimal engagement for medium to heavy-duty applications across manufacturing, automotive, and industrial maintenance sectors.
Specification Summary & Compliance
Manufactured to Unified Standard Class 3A thread tolerances with UNC coarse thread profile and right-hand threading. Full compliance with ASME B18.2.1 dimensional specifications and SAE J429 material standards. The zinc yellow-chromate plating meets industrial corrosion protection requirements while maintaining Rockwell C25 hardness and 120,000 psi tensile strength throughout the fastener's service life.
