S-91259A502 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
- Exceptional load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for reliable performance in demanding applications
- Superior corrosion resistance through black oxide finish that protects against rust and extends service life
- Precision thread engagement with Class 3A thread fit ensuring tight tolerances and secure fastening
- Enhanced grip and handling thanks to the knurled head texture that prevents slipping during installation
- Optimized for heavy machinery with coarse UNC threads providing excellent vibration resistance and quick assembly
- Industry-standard compliance meeting ASME B18.3 specifications for guaranteed quality and interchangeability
- Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
Professional Applications & Engineering Value
This alloy steel shoulder screw delivers exceptional engineering value in precision machinery and industrial equipment applications. The 5/8"-11 UNC coarse threads combined with Class 3A thread fit provide superior vibration resistance and reliable fastening in high-stress environments. The 3/4" shoulder diameter with tight tolerances (-0.004" to -0.002") ensures precise alignment of rotating components, while the black oxide finish offers enhanced corrosion protection for extended service life in harsh operating conditions. The hex socket drive with knurled head facilitates secure installation in confined spaces, making it ideal for automotive assemblies, manufacturing equipment, and precision instruments where dimensional accuracy and durability are critical.
Specification Summary & Compliance
This shoulder screw maintains precision dimensional control with Class 3A thread fit, shoulder diameter tolerance of -0.004" to -0.002", and shoulder length tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications with UNC coarse threads and right-hand thread direction. The component is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental standards while delivering reliable performance in industrial applications.
