S-97345A660 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 and marine environments.
- Enhanced installation security provided by the knurled socket head and 1/4" hex drive, preventing tool slippage.
- High load-bearing capacity from 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications.
- Precise alignment and spacing ensured by the Class 3A thread fit and standard shoulder, reducing assembly errors.
- Durable coarse UNC threading (5/16"-18) for faster assembly and better resistance to vibration loosening.
- Compliance with major standards including ASME B18.3, RoHS 3, and REACH for reliable, safe use in regulated industries.
- Consistent dimensional accuracy with tight shoulder diameter and length tolerances for repeatable performance.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and pivoting assemblies. The Class 3A thread fit and coarse 5/16"-18 UNC thread provide excellent vibration resistance and quick installation, reducing downtime in high-cycle operations. The knurled socket head with a 1/4" hex drive ensures secure torque application, preventing damage in tight spaces. Its high tensile strength and corrosion-resistant material make it suitable for industrial applications like robotics, conveyor systems, and packaging equipment, where reliability and durability are paramount. The precisely machined shoulder offers stable bearing surfaces, maintaining alignment in rotating components.
Specification Summary & Compliance
This shoulder screw features a 5/16"-18 UNC coarse thread with a Class 3A fit for high precision. Dimensions include a shoulder diameter of 1/2" (tolerance: -0.004" to -0.002") and shoulder length of 3/4" (tolerance: -0.005" to 0.005"). It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
