S-97345A562 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
- Precise component alignment ensured by the 3 3/4" shoulder length with tight tolerances for reliable assembly
- High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure, vibration-resistant fastening with Class 3A thread fit and UNC coarse threads for quick assembly and stability
- Easy installation and removal using the 5/32" hex socket drive and knurled head for improved grip
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety
- Durable, long-lasting operation with Rockwell B79 hardness for wear resistance in repetitive use scenarios
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and assembly jigs where alignment accuracy and corrosion resistance are paramount. The 1/4"-20 UNC coarse thread and Class 3A thread fit provide reliable fastening in high-vibration environments, reducing the risk of loosening. The extended 3 3/4" shoulder length acts as a precise pivot or spacer, minimizing misalignment in rotating components. With its hex socket drive and knurled head, it offers tool accessibility in confined spaces, making it ideal for industrial applications requiring repeatable, secure assemblies under mechanical stress and exposure to corrosive agents.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit and a shoulder diameter tolerance of -0.004" to -0.002" for precise dimensional control. It complies with ASME B18.3 manufacturing standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
