S-90128A388 1/4"-28 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
- Superior tensile strength of 170,000 psi ensures reliable performance in high-stress applications
- Precision Class 3A thread fit guarantees secure fastening with minimal vibration loosening
- Zinc-plated alloy steel construction provides excellent corrosion resistance for extended service life
- Fine thread spacing delivers enhanced clamping force and superior vibration resistance
- 3/16" hex drive design allows for high-torque installation in confined spaces
- Rockwell C37 hardness rating maintains thread integrity under repeated assembly cycles
- Partially threaded configuration offers optimal grip length for precise joint control
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these 1/4"-28 UNF socket head cap screws provide exceptional reliability in machinery assembly, automotive systems, and precision equipment. The zinc-plated alloy steel construction combats corrosion while maintaining 170,000 psi tensile strength, making them ideal for applications requiring both durability and high load-bearing capacity. The fine thread spacing and Class 3A thread fit ensure vibration-resistant connections in dynamic operating conditions. With their 3/16" hex drive and standard socket head profile, these fasteners enable efficient installation in space-constrained assemblies while delivering consistent clamping force across critical joints.
Specification Summary & Compliance
This socket head cap screw features precision Class 3A thread fit with 1/4"-28 UNF fine threads and right-hand thread direction. Manufactured to ASTM A574 specifications, the fastener demonstrates compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The product maintains dimensional accuracy with a 2" overall length, 1" minimum thread length, and standard socket head profile, ensuring interchangeability and reliable performance in industrial fastening applications.
