S-91259A465 8-32 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, ensuring reliable performance in high-stress industrial applications.
- Superior Corrosion Resistance: Black oxide finish provides enhanced protection against rust and wear, extending service life.
- Precision Thread Fit: Class 3A UNC coarse threads offer secure, vibration-resistant fastening with minimal backlash.
- High Hardness & Durability: Rockwell C32 hardness and alloy steel construction resist deformation under heavy loads.
- Secure Hex Drive & Knurled Head: 3/32" hex socket and knurled texture enable easy installation and prevent tool slippage.
- Accurate Shoulder Dimensions: 3/16" shoulder length and diameter with tight tolerances ensure precise alignment in assemblies.
- Compliance with Industry Standards: Meets ASME B18.3 specifications and is RoHS 3/REACH compliant for safe, global use.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address critical challenges in machinery, automation, and precision equipment. The 8-32 UNC coarse thread and Class 3A fit provide robust, vibration-resistant connections, reducing maintenance in dynamic environments. The black oxide finish enhances corrosion resistance, ideal for humid or abrasive conditions. With a 3/16" shoulder length and knurled socket head, it ensures exact component alignment and easy installation using standard hex tools. These features make it perfect for pivots, axles, and spacers in industrial assemblies, delivering long-term reliability and reduced downtime.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with UNC coarse threads and precise shoulder dimensions (diameter tolerance: -0.004" to -0.002"; length tolerance: -0.005" to 0.005"). Manufactured to ASME B18.3 standards using ASTM A574 alloy steel, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global acceptability.
