S-97345A222 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 316 stainless steel construction, ideal for harsh industrial environments and extended service life.
- High-strength performance offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
- Precise Class 3A thread fit ensures tight, secure fastening with minimal backlash and improved assembly accuracy.
- Enhanced grip and torque application from the knurled socket head and 3/16" hex drive, reducing tool slippage during installation.
- Accurate component alignment with a consistent 3/8" shoulder diameter and 5/16" shoulder length, providing a stable pivot or bearing surface.
- Broad industry compliance meeting ASME B18.3 specifications and environmental standards like RoHS 3 and REACH for global supply chain compatibility.
- Durable material hardness rated at Rockwell B79, resisting wear and deformation under repeated use.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision assembly and motion control systems. The 5/16"-18 UNC coarse thread and Class 3A fit provide exceptional clamping force and vibration resistance, reducing maintenance in machinery and automation equipment. Its socket head with knurling allows for high-torque installation in confined spaces, while the precisely machined shoulder ensures accurate alignment for rotating parts like gears and pulleys. Ideal for industrial fastening in manufacturing, automotive, and marine sectors, it combines high tensile strength with corrosion resistance to prolong equipment lifespan and minimize downtime.
Specification Summary & Compliance
This shoulder screw maintains tight dimensional tolerances, including a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002") and shoulder length of 5/16" (tolerance: -0.005" to 0.005"). The UNC coarse thread adheres to Class 3A precision standards, ensuring reliable thread engagement. Manufactured in compliance with ASME B18.3, it is also RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for industrial use.
