S-91259A503 3/4"-10 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 for reliable performance in demanding applications
- Superior corrosion resistance through black oxide finish, extending service life in harsh industrial environments
- Precision alignment and smooth rotation with 7/8" shoulder diameter and 1 1/2" shoulder length for accurate component positioning
- Secure installation and removal with 1/4" hex drive and knurled head for enhanced grip during torque application
- Reliable thread engagement featuring Class 3A UNC coarse threads for quick assembly and vibration resistance
- Consistent mechanical properties with Rockwell C32 hardness and alloy steel construction for uniform performance
- Reduced maintenance requirements through compliant surface treatment meeting RoHS 3 and REACH environmental standards
Professional Applications & Engineering Value
This alloy steel shoulder screw delivers critical engineering solutions for industrial machinery requiring precise component alignment and high-strength fastening. The black oxide finish provides essential corrosion protection in manufacturing environments exposed to moisture and chemicals, while the knurled socket head ensures secure tool engagement during high-torque applications. The 7/8" shoulder diameter maintains accurate bearing surfaces in rotating assemblies, and the Class 3A UNC coarse threads enable rapid assembly in production lines. Engineered to ASTM A574 specifications, these shoulder screws prevent misalignment in precision equipment, reduce wear in pivot points, and maintain structural integrity under heavy loads exceeding 140,000 psi tensile strength.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit and shoulder diameter tolerance of -0.004" to -0.002" for precision applications. Thread specifications include 3/4"-10 UNC coarse thread with 1" thread length. Complies with ASTM A574 manufacturing standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for restricted substances.
