S-91251A429 1 1/2"-6 x 3 1/4" 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 for reliable performance in high-stress industrial applications
- Superior corrosion resistance with black-oxide coating that protects against rust and extends service life
- Precise Class 2A thread fit ensures smooth installation and secure fastening with minimal play
- Fully threaded design provides consistent holding power along the entire 3 1/4" length
- Heavy-duty hex drive with 1" drive size allows for high torque application and reduced stripping risk
- Coarse UNC threading enables quick assembly and superior resistance to vibration loosening
- Compliance with ASTM A574 guarantees consistent quality and mechanical properties
Professional Applications & Engineering Value
These black-oxide alloy steel socket head cap screws deliver critical engineering advantages in demanding applications. The Rockwell C37 hardness combined with 170,000 psi tensile strength makes them ideal for heavy machinery, automotive assemblies, and construction equipment where vibration resistance and structural integrity are paramount. The coarse UNC thread design prevents cross-threading during rapid assembly operations, while the fully threaded configuration ensures maximum engagement in thick materials. The hex drive socket head provides superior torque transmission in confined spaces, solving accessibility challenges in complex assemblies. These industrial fasteners maintain performance under extreme conditions, reducing maintenance frequency and downtime.
Specification Summary & Compliance
This socket head cap screw features 1 1/2"-6 UNC coarse threads with Class 2A thread fit for precise dimensional accuracy. Manufactured to ASTM A574 specifications, it ensures consistent mechanical properties and reliability. The fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict chemical substance restrictions.
