S-90044A311 1/4"-20 x 9" 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 under high-stress conditions, reducing the risk of fastener failure.
- Superior corrosion resistance from the black-oxide finish prolongs service life in harsh industrial environments.
- Precise Class 3A thread fit provides secure, vibration-resistant connections for critical assemblies.
- Partially threaded design allows for controlled clamping force and easier alignment in applications requiring specific grip lengths.
- High hardness (Rockwell C37) enhances wear resistance, maintaining thread integrity through repeated use.
- Hex socket drive enables high-torque installation with standard tools, minimizing stripping and improving efficiency.
- Compliance with ASTM A574, RoHS 3, and REACH ensures material consistency and environmental safety for global supply chains.
Professional Applications & Engineering Value
Engineered for demanding industrial applications, this black-oxide alloy steel socket head cap screw combines high tensile strength and corrosion resistance to address common challenges in machinery, automotive, and heavy equipment assembly. The UNC coarse threads and Class 3A fit provide excellent engagement in both metals and plastics, reducing cross-threading risks. Its partially threaded shank concentrates clamping force where needed, ideal for securing components like brackets, frames, and motor mounts. The hex drive allows for tight spaces and high torque, while the black-oxide surface treatment adds durability against moisture and chemicals, extending maintenance intervals and lowering lifecycle costs.
Specification Summary & Compliance
This socket head cap screw meets ASTM A574 specifications for high-strength alloy steel, with UNC 1/4"-20 coarse threads and a Class 3A thread fit for precise dimensional accuracy. It is manufactured to comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for international industrial use.
