S-91264A220 3/4"-10 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
- Secure vibration-resistant fastening thanks to the integrated nylon pellet thread locker that maintains integrity from -50° to 250°F
- Precise alignment and smooth rotation ensured by the Class 3A thread fit and standardized shoulder diameter tolerances
- Enhanced corrosion resistance through black oxide finish, extending service life in harsh industrial environments
- Easy installation and removal with 1/2" hex drive and knurled head for superior grip and torque application
- Superior durability from alloy steel construction with Rockwell C32 hardness for long-term reliability
- Industry-standard compatibility with 3/4"-10 UNC coarse thread pattern suitable for various industrial assemblies
Professional Applications & Engineering Value
This alloy steel shoulder screw delivers critical engineering solutions where precision alignment and high-strength fastening are paramount. The 3/4"-10 UNC coarse thread with Class 3A fit ensures precise engagement in machinery, automotive, and heavy equipment applications where vibration resistance is essential. The black oxide finish provides reliable corrosion protection in demanding environments, while the integrated nylon pellet thread locker prevents loosening under dynamic loads. The knurled socket head with 1/2" hex drive facilitates easy installation in confined spaces, making it ideal for precision assemblies, rotating shafts, and pivot points where the shoulder serves as a precise locating diameter.
Specification Summary & Compliance
This shoulder screw features precision Class 3A thread fit with 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 using ASTM A574 alloy steel, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring both mechanical excellence and regulatory compliance for industrial applications.
