S-91259A844 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 shear resistance with minimum 84,000 psi shear strength for reliable performance in high-stress applications
- Precision thread engagement with Class 3A fit ensures secure fastening and vibration resistance in demanding environments
- Superior corrosion protection through black oxide finish extends service life in harsh industrial conditions
- Enhanced grip and torque application with knurled head and 3/8" hex drive for secure installation and maintenance
- High tensile strength of 140,000 psi provides structural integrity for heavy-duty mechanical assemblies
- Dimensional stability with tight shoulder diameter and length tolerances ensures precise alignment in machinery
- Industry compliance meets ASME B18.3 and ASTM A574 standards for guaranteed quality and interoperability
Professional Applications & Engineering Value
This alloy steel shoulder screw with black oxide finish delivers critical performance in precision mechanical systems where alignment and rotational control are paramount. The 5/8"-11 UNC coarse threads with Class 3A fit provide superior vibration resistance in high-RPM equipment, while the precisely machined shoulder maintains accurate component positioning in assemblies. Engineered for industrial applications requiring both structural support and rotational freedom, this fastener solves common challenges of misalignment and premature wear in machinery, conveyor systems, and automated equipment. The combination of Rockwell C32 hardness and corrosion-resistant finish ensures long-term reliability in demanding manufacturing environments.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit per UNC specifications and tight shoulder tolerances (diameter: -0.004" to -0.002", length: -0.005" to 0.005"). Complies with ASME B18.3 dimensional requirements and ASTM A574 material specifications. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards for use in regulated industries.
