S-92327A810 1/4"-20 x 3/4" 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
- Superior corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
- High tensile strength of 120,000 psi ensures reliable load-bearing capacity for medium-duty applications
- Precise Class 3A thread fit provides consistent engagement and reduces the risk of cross-threading during assembly
- External square drive design allows for high-torque installation with standard tools, minimizing slippage
- Fully threaded shank offers maximum grip length and uniform clamping force across the entire fastener
- Rockwell C25 hardness maintains structural integrity under repetitive stress and vibration
- Coarse UNC threading enables quick assembly and disassembly, even in debris-prone conditions
Professional Applications & Engineering Value
This 1/4"-20 UNC Grade 5 Square Head Screw is engineered to address common industrial challenges such as vibration loosening, corrosion-induced failure, and assembly inefficiency. The steel construction combined with zinc yellow-chromate plating provides a durable barrier against moisture and chemicals, making it ideal for outdoor equipment, machinery frames, and structural assemblies. The external square drive and coarse thread design allow for rapid installation with high torque transmission, reducing labor time in production lines. Fully threaded for uniform stress distribution, this fastener ensures consistent clamping force in heavy-duty applications where medium strength and reliability are critical.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A fit for precise tolerance, ensuring compatibility with standard nuts and tapped holes. Manufactured from high-grade steel, it meets SAE Grade 5 strength requirements, including a tensile strength of 120,000 psi and Rockwell C25 hardness. The product complies with ASME B18.2.1 and SAE J429 specifications, guaranteeing consistent dimensions and performance. The zinc yellow-chromate finish adheres to RoHS and REACH environmental standards, providing both corrosion protection and regulatory compliance for industrial use.
