S-91259A839 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
- Superior load-bearing capacity with 140,000 psi tensile strength and 84,000 psi shear strength for demanding industrial applications
- Enhanced corrosion resistance from the black oxide finish, extending service life in harsh environments
- Precision alignment and reduced wear thanks to the 3/4" shoulder diameter with tight tolerances (-0.004" to -0.002")
- Reliable thread engagement with Class 3A UNC coarse threads ensuring secure fastening and vibration resistance
- Easy installation and removal via the 3/8" hex drive and knurled head for improved grip during tool operation
- Consistent performance in high-stress conditions due to Rockwell C32 hardness and alloy steel construction
- Broad regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, global industrial use
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and durability challenges in industrial applications such as machinery assembly, automation systems, and precision guides. The alloy steel material, combined with a black oxide finish, provides excellent resistance to corrosion and wear, reducing maintenance needs in demanding environments. The 3/4" shoulder diameter with minimal tolerance ensures precise component positioning, minimizing misalignment and extending equipment life. With 5/8"-11 UNC coarse threading and Class 3A fit, it offers reliable fastening under high vibration, making it ideal for heavy-duty shoulder screw uses like stripper bolts and guide posts. The socket head with hex drive allows for easy access in confined spaces, enhancing installation efficiency.
Specification Summary & Compliance
This shoulder screw adheres to Class 3A thread fit and UNC coarse thread standards, with shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for high precision. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial operations.
