S-91259A450 5/8"-11 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
- Enhanced Durability & Strength - Alloy steel construction with Rockwell C32 hardness delivers 140,000 psi tensile and 84,000 psi shear strength for reliable performance under heavy loads.
- Superior Corrosion Resistance - Black oxide finish provides excellent protection against rust and wear in demanding industrial environments.
- Precision Thread Fit - Class 3A UNC coarse threads ensure secure, vibration-resistant connections with consistent engagement.
- Easy Installation & Removal - Socket head with 3/8" hex drive and knurled texture offers superior grip and torque application.
- Accurate Shoulder Alignment - Tight diameter tolerance (-0.004" to -0.002") maintains precise component positioning in assemblies.
- Industry Compliance - Meets ASME B18.3 specifications and RoHS 3/REACH regulations for safe, standardized use.
- Versatile Right-Hand Threading - 5/8"-11 UNC coarse thread design accommodates various industrial applications with standard tooling.
Professional Applications & Engineering Value
This alloy steel shoulder screw with black oxide finish addresses critical engineering challenges in heavy machinery, automation systems, and precision equipment. The knurled socket head combined with 3/8" hex drive prevents tool slippage during high-torque installation, while the Class 3A UNC threads maintain secure fastening in high-vibration environments. The precisely machined shoulder with tight diameter tolerance ensures accurate alignment of rotating components, bearings, and linkages, reducing wear and extending service life. Ideal for industrial applications requiring reliable positioning and repeated disassembly, this fastener's 140,000 psi tensile strength withstands extreme operational stresses without compromising performance.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit and precise shoulder diameter tolerance of -0.004" to -0.002". The 5/8"-11 UNC coarse thread ensures compatibility with standard components while the alloy steel construction meets ASTM A574 requirements. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and restricted substance management.
