S-90128A253 1/4"-20 x 2" ASTM A574 Alloy Steel Socket Head Screws
Alloy Steel Socket 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 170,000 PSI ensures reliable performance in high-stress applications, reducing the risk of fastener failure.
- Superior corrosion resistance with zinc-plated alloy steel construction, extending service life in harsh industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies with minimal backlash.
- Partially threaded design allows for controlled clamping force and easier alignment in precision machinery setups.
- High hardness rating (Rockwell C37) enhances wear resistance and maintains thread integrity under repeated use.
- Hex socket drive (3/16") enables high-torque installation with standard tools, improving assembly efficiency and reducing strip-out risks.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency, environmental safety, and global regulatory acceptance.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 1/4"-20 UNC Socket Head Cap Screws deliver critical reliability in machinery, automotive, and heavy equipment assemblies. The zinc-plated alloy steel construction combats corrosion while the coarse UNC thread facilitates quick installation in tough materials. With a partially threaded shank, they provide optimal grip length for joint stability, preventing loosening under dynamic loads. The hex drive socket head allows flush mounting in confined spaces, making them ideal for high-strength fastening where standard wrenches can't reach. These screws address common failure points by combining 170,000 PSI tensile strength with precise Class 3A thread fit, ensuring long-term performance in vibration-prone environments.
Specification Summary & Compliance
This fastener meets Class 3A thread tolerances for inch-series applications with 1/4"-20 UNC coarse threads and right-hand direction. Manufacturing conforms to ASTM A574 specification for high-strength socket head cap screws. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring restricted substance control. Dimensions include 2" length, 3/8" head diameter, and 3/16" hex drive size.
