S-97832A324 1/4"-28 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 18-8 stainless steel construction, ideal for harsh industrial environments.
- Enhanced assembly precision due to Class 3A thread fit and fine UNF threads, ensuring tight, secure connections.
- High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding applications.
- Secure and non-slip handling with a knurled head and hex drive, facilitating easy installation and removal.
- Accurate component alignment provided by the precisely machined shoulder with controlled diameter and length tolerances.
- Long-term reliability backed by Rockwell B55 hardness, resisting wear and deformation under load.
- Broad industry compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, regulated use.
Professional Applications & Engineering Value
This socket head shoulder screw is engineered to address critical alignment and fastening challenges in precision assemblies. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for applications in machinery, automotive, and electronics where environmental factors are a concern. The 1/4"-28 UNF fine thread with Class 3A fit ensures minimal backlash and vibration resistance, crucial for maintaining positional accuracy in moving parts. The 5/16" shoulder length acts as a precise pivot or spacer, reducing wear on connected components and simplifying assembly in tight tolerances. Combined with a knurled head for secure grip during installation, this screw delivers consistent performance in jigs, fixtures, and rotational equipment, enhancing overall engineering efficiency and product lifespan.
Specification Summary & Compliance
This shoulder screw adheres to strict dimensional standards, including a Class 3A thread fit for high precision and a shoulder diameter tolerance of -0.004" to -0.002" with length tolerance of -0.005" to 0.005". It conforms to ASME B18.3 specifications for consistent quality and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial and international markets.
