S-97768A475 3/8"-16 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
- Superior load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in high-stress applications.
- Precision alignment and reduced wear thanks to the 5/8" shoulder diameter with tight tolerance control (-0.004" to -0.002") for exact component positioning.
- Secure, non-slip installation enabled by the knurled socket head and hex drive, preventing tool slippage during tightening.
- High-reliability thread engagement with Class 3A UNC coarse threads ensuring consistent fastening and vibration resistance.
- Broad industry compliance meeting ASME B18.3 standards and being RoHS 3 & REACH compliant for global regulatory acceptance.
- Optimized for durability with a Rockwell B55 hardness, providing excellent wear resistance and long service life.
Professional Applications & Engineering Value
This 3/8"-16 UNC shoulder screw is engineered to address critical alignment and strength challenges in industrial machinery, automation systems, and precision assemblies. The 18-8 stainless steel material, combined with a black oxide finish, offers robust protection against corrosion and oxidation, extending component life in demanding conditions. The precisely machined 5/8" shoulder diameter with controlled tolerances ensures accurate locating and reduced bearing surface wear, while the Class 3A thread fit and coarse UNC threads provide secure, vibration-resistant fastening. Ideal for use in pivots, spindles, and rotating mechanisms, this screw enhances operational reliability and minimizes maintenance downtime in heavy-duty applications.
Specification Summary & Compliance
This shoulder screw features a 3/8"-16 UNC thread with Class 3A fit for high precision, a shoulder diameter tolerance of -0.004" to -0.002", and a shoulder length tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and is fully RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to international safety and environmental standards.
