S-91205A736 5/8"-11 x 3" ASME B18.3, ASTM A574 Alloy Steel Thread-Locking Socket Head Screws
Alloy Steel Thread-Locking 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 extreme loads, reducing the risk of fastener failure in demanding applications.
- Built-in nylon patch thread locker provides vibration resistance and prevents loosening, maintaining clamp force in temperatures from -70°F to 250°F.
- Black-oxide coating on alloy steel offers corrosion resistance and a durable, non-galling surface for extended service life.
- Precision Class 3A thread fit guarantees tighter tolerances and superior engagement for secure, high-integrity assemblies.
- 1/2" hex drive and standard socket head allow for high torque application and easy installation in confined spaces with standard tools.
- Partially threaded design with coarse UNC thread enables quick assembly and optimal grip in a wide range of materials.
- Full compliance with ASME B18.3 and ASTM A574 ensures consistent quality, dimensional accuracy, and material reliability for professional use.
Professional Applications & Engineering Value
This black-oxide alloy steel socket head cap screw is engineered to address critical challenges in heavy machinery, automotive, and industrial equipment assembly. The coarse UNC thread and Class 3A thread fit provide excellent resistance to vibration and dynamic loads, minimizing maintenance needs. The nylon patch thread locker securely locks the fastener without requiring additional compounds, ideal for applications exposed to thermal cycling. With a Rockwell C37 hardness and robust alloy steel construction, it delivers long-term durability in high-stress environments, ensuring operational safety and reducing downtime.
Specification Summary & Compliance
This screw features a 5/8"-11 UNC coarse thread with Class 3A fit for precise engagement, a 3" length, and partial threading. It meets ASME B18.3 and ASTM A574 specifications for dimensional and material standards. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations.
