S-97768A412 5/16"-18 ASME B18.3 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 corrosion resistance with 18-8 Stainless Steel construction and Black Oxide finish, ideal for harsh industrial environments
- Precise alignment and smooth rotation ensured by the 1/2" shoulder diameter with tight tolerance control
- High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure, non-slip installation with knurled head and 1/4" hex drive for reliable torque transmission
- Consistent thread engagement through Class 3A thread fit and 5/16"-18 UNC coarse threading
- Extended service life with Rockwell B55 hardness providing excellent wear resistance
- Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations
Professional Applications & Engineering Value
This 5/16"-18 UNC shoulder screw delivers exceptional engineering value in precision assembly applications where alignment and durability are critical. The 18-8 Stainless Steel construction with Black Oxide finish provides superior corrosion resistance for machinery operating in demanding environments. The 1/2" shoulder diameter with controlled tolerances ensures precise component positioning in rotating assemblies, while the Class 3A thread fit guarantees secure fastening in high-vibration applications. The socket head design with knurled texture offers reliable installation in confined spaces, making it ideal for industrial equipment, automation systems, and precision machinery where shoulder screws must maintain alignment under load while resisting environmental degradation.
Specification Summary & Compliance
This shoulder screw features precision Class 3A thread fit with 5/16"-18 UNC coarse threading and maintains tight shoulder diameter tolerance of -0.004" to -0.002". Manufactured to ASME B18.3 specifications, it ensures dimensional accuracy and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest industry standards for safe and sustainable industrial components.
