S-90044A132 1/4"-28 x 1 1/2" 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 under high-stress conditions, reducing the risk of fastener failure in demanding applications.
- Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life and maintaining integrity in harsh industrial environments.
- Precise Class 3A thread fit provides tighter tolerances for secure, vibration-resistant assemblies, minimizing loosening in critical machinery.
- Fine UNRF threads offer improved load distribution and sealing capabilities compared to coarse threads, ideal for precision equipment.
- Hex socket drive design allows for high-torque installation with standard tools, facilitating efficient assembly and maintenance.
- Full threading along the 1-1/2" length ensures maximum grip and adjustability, accommodating various material thicknesses.
- Compliance with ASTM A574, RoHS 3, and REACH guarantees material quality and environmental safety, meeting global industry standards.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in heavy machinery. The Class 3A fine UNRF thread ensures a precise fit, reducing the need for frequent retightening in automotive, aerospace, and manufacturing equipment. Its high tensile strength and Rockwell C37 hardness provide durability against dynamic loads, while the hex drive enables secure installation in confined spaces. Ideal for precision assemblies requiring reliable fastening, this screw minimizes downtime and maintenance costs in industrial applications.
Specification Summary & Compliance
The screw adheres to Class 3A thread fit per UNRF standards, ensuring dimensional accuracy and interchangeability. Manufactured in compliance with ASTM A574 for material consistency, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and global industrial use.
