S-97345A213 1/4"-20 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 for reliable performance in harsh industrial environments
- Precise component alignment through the 3" shoulder length with tight tolerances for stable mechanical assemblies
- High-strength fastening solution delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure installation and removal with knurled socket head and 5/32" hex drive preventing tool slippage
- Exceptional thread reliability with Class 3A fit UNC coarse threads ensuring vibration resistance and consistent engagement
- Industry-standard compliance meeting ASME B18.3 specifications for guaranteed interchangeability and quality
- Environmental regulation adherence with RoHS 3 and REACH compliance for safe use across global markets
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical engineering advantages in precision machinery and industrial equipment. The 3" shoulder length with controlled diameter tolerance provides exact component spacing and rotational support in assemblies requiring precise axial alignment. The Class 3A thread fit with 1/4"-20 UNC coarse threads ensures rapid assembly while maintaining vibration resistance in high-stress applications. The knurled socket head with 5/32" hex drive prevents cam-out during torque application, reducing installation damage in automated production environments. Ideal for precision instruments, conveyor systems, and manufacturing jigs where corrosion resistance, dimensional stability, and reliable fastening are paramount.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit per UNC specifications and shoulder diameter tolerance of -0.004" to -0.002". The 3" shoulder length maintains precision with -0.005" to 0.005" tolerance. Fully compliant with ASME B18.3 standards for dimensional consistency and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for international industrial markets and restricted substance compliance.
