S-91259A606 6-32 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
- Superior corrosion resistance with black oxide finish, extending service life in harsh industrial environments
- Exceptional mechanical strength from alloy steel construction, supporting heavy loads with 140,000 psi tensile strength
- Precision Class 3A thread fit ensuring reliable engagement and vibration resistance in critical assemblies
- Optimal hardness balance at Rockwell C32, providing excellent wear resistance without brittleness
- Standard hex drive compatibility for efficient installation using common 3/32" tools
- Coarse UNC threading enabling quick assembly and reduced cross-threading risks
- Full regulatory compliance meeting ASTM A574, RoHS 3, and REACH standards for global industrial applications
Professional Applications & Engineering Value
This alloy steel shoulder screw with black oxide finish addresses critical challenges in precision machinery and industrial equipment. The 6-32 UNC coarse thread configuration combined with Class 3A thread fit ensures secure fastening in high-vibration environments, preventing loosening in automation systems and rotating assemblies. The precisely machined shoulder provides accurate alignment for moving components in robotics, CNC equipment, and bearing assemblies, while the socket head design allows for compact installation in space-constrained applications. The combination of 140,000 psi tensile strength and corrosion-resistant finish makes it ideal for demanding environments where both mechanical performance and environmental protection are essential.
Specification Summary & Compliance
Manufactured to Class 3A thread fit tolerances with UNC coarse threading (6-32 size), this shoulder screw maintains dimensional accuracy with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". The product complies with ASTM A574 specification for alloy steel socket head cap screws and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for international industrial markets and restricted substance compliance.
