S-97345A247 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 performance in high-stress applications.
- Precise alignment and smooth rotation ensured by the Class 3A thread fit and standard shoulder fit, reducing wear and assembly time.
- Enhanced grip and easy installation provided by the knurled socket head and 3/16" hex drive, preventing tool slippage.
- Long-term durability backed by Rockwell B79 hardness, maintaining integrity under repeated use.
- Broad compatibility with UNC coarse threads and right-hand direction, fitting standard industrial components seamlessly.
- Compliance with global standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address common industrial challenges, such as misalignment and corrosion-induced failure. Its 1/4"-20 UNC coarse thread and Class 3A fit provide secure fastening with minimal play, essential for precision machinery, automotive assemblies, and conveyor systems. The knurled socket head and hex drive allow for quick, tool-resistant installation, reducing downtime in production lines. With a 3/8" shoulder diameter and 1 1/4" shoulder length, it supports rotating parts like bearings and pulleys, ensuring smooth operation and extended service life in demanding environments.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a thread diameter of 0.25" and length of 3/4", with shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" for consistent fit. It adheres to ASME B18.3 standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring no hazardous substances and meeting international regulatory requirements for industrial use.
