S-97345A524 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, ideal for harsh industrial and marine environments
- Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing performance
- Precise Class 3A thread fit ensures tight tolerances and secure fastening in critical assemblies
- Enhanced grip and tool engagement from the knurled head and 5/32" hex socket drive
- Optimized for high-vibration applications with coarse UNC threads and robust shoulder design
- Full regulatory compliance with ASME B18.3 standards and RoHS 3/REACH environmental directives
- Versatile shoulder geometry provides accurate component alignment and rotational control
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw delivers critical performance in demanding mechanical systems where corrosion resistance, precision alignment, and high clamping force are essential. The Class 3A thread fit maintains tight tolerances for secure fastening in high-vibration environments, while the coarse 1/4"-20 UNC threads enable rapid assembly and disassembly. The knurled socket head provides superior tool grip during torque application, preventing cam-out in confined spaces. Engineered for machinery, automation equipment, and precision instruments, this fastener's 70000 psi tensile strength ensures reliable performance under sustained mechanical stress while the corrosion-resistant 316 composition withstands chemical exposure and outdoor conditions.
Specification Summary & Compliance
This shoulder screw features 1/4"-20 UNC coarse threads with Class 3A precision fit and maintains tight shoulder diameter tolerance of -0.004" to -0.002". Manufactured to ASME B18.3 specifications with Rockwell B79 hardness, the fastener is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for restricted substance-controlled applications across global markets.
