S-91259A105 10-24 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 & Corrosion Resistance – Black oxide finish protects against rust and wear in demanding industrial environments.
- Superior Tensile & Shear Strength – With 140,000 psi tensile and 84,000 psi minimum shear strength, it ensures reliable performance under high-stress conditions.
- Precision Fit & Alignment – Class 3A thread fit and controlled shoulder diameter tolerances provide accurate positioning in assemblies.
- High Hardness for Longevity – Rockwell C32 hardness offers excellent resistance to deformation and extends service life.
- Easy Installation & Removal – Hex socket drive and knurled head allow for secure, tool-friendly fastening without slipping.
- Broad Compliance & Reliability – Meets ASME B18.3 standards and is RoHS 3 and REACH compliant for safe, regulated use.
- Versatile Coarse Thread Design – 10-24 UNC thread ensures quick assembly and strong holding power in various materials.
Professional Applications & Engineering Value
This 10-24 UNC shoulder screw is engineered to address critical alignment and load-bearing challenges in precision machinery and industrial assemblies. Made from alloy steel and finished with a protective black oxide coating, it resists corrosion while maintaining high tensile and shear strength. The 1/4" shoulder diameter and 2-1/2" shoulder length provide a stable pivot or spacer, reducing wear and misalignment in rotating parts, linkages, and fixturing applications. Its hex socket drive and knurled head ensure easy installation even in confined spaces, making it ideal for automated equipment, motor mounts, and precision instruments where reliability and repeatability are paramount.
Specification Summary & Compliance
This shoulder screw features a 10-24 UNC coarse thread with Class 3A fit for precise engagement, and shoulder diameter tolerance of -0.004" to -0.002". It complies with ASME B18.3 specifications and is manufactured from alloy steel per ASTM A574. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets environmental and safety standards for industrial use.
