S-91264A720 1/2"-13 ASME B18.3, ASTM A574 Shoulder Screws
Shoulder 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: Withstands up to 140,000 psi for reliable performance in high-stress applications.
- Vibration-Resistant Locking: Permanent nylon pellet thread locker ensures secure fastening from -50° to 250°F, preventing loosening.
- Precision Alignment: Class 3A thread fit and standard shoulder fit provide accurate positioning for machinery and assemblies.
- Durable Corrosion Protection: Black oxide finish on alloy steel enhances longevity in harsh industrial environments.
- Easy Installation and Removal: Hex socket drive with knurled head allows for quick, tool-friendly handling without slippage.
- Heavy-Duty Shoulder Design: 2" shoulder length supports rotational components, reducing wear and misalignment.
- Broad Compliance: Meets ASME B18.3 standards and is RoHS 3 and REACH compliant for safe, global use.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address common industrial challenges such as component misalignment and vibration-induced failures. The Class 3A thread fit and precise shoulder diameter ensure exact positioning in machinery, while the nylon pellet thread locker maintains integrity under dynamic loads from -50° to 250°F. Ideal for heavy-duty applications like automotive assemblies, robotics, and precision equipment, its black oxide finish provides corrosion resistance, extending service life. The hex drive and knurled head facilitate easy installation, reducing downtime in production lines and enhancing overall engineering reliability.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC coarse thread with Class 3A fit for high precision, a shoulder diameter of 5/8" with tight tolerances (-0.004" to -0.002"), and a shoulder length of 2" (±0.005"). Manufactured from alloy steel with a hardness of Rockwell C32, it meets ASME B18.3 specifications and is compliant with RoHS 3 and REACH regulations, ensuring environmental safety and performance consistency in industrial settings.
