S-97345A466 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 316 stainless steel construction, ideal for harsh environments and extended service life.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high stress.
- Precise Class 3A thread fit ensures tight, secure connections with minimal backlash in critical assemblies.
- Secure and efficient installation with a knurled socket head and 5/32" hex drive, preventing tool slippage.
- Accurate shoulder positioning with controlled diameter and length tolerances for consistent alignment of components.
- Compliance with industry standards including ASME B18.3, ensuring interchangeability and quality in engineering applications.
- Environmental and safety compliance with RoHS 3 and REACH, making it suitable for regulated industries.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and mechanical failure. The 1/4"-28 UNF fine thread with Class 3A fit provides superior holding power in precision equipment, reducing the risk of loosening under vibration. The knurled socket head and hex drive enable quick, secure installation in confined spaces, while the hardened Rockwell B79 material ensures durability in high-stress applications like machinery, automotive assemblies, and electronic enclosures. Its corrosion-resistant properties make it ideal for marine, chemical, and food processing industries, offering long-term reliability and reduced maintenance costs.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with precise dimensions: thread size of 1/4"-28 UNF, shoulder diameter of 5/16" (tolerance: -0.004" to -0.002"), and shoulder length of 1/4" (tolerance: -0.005" to 0.005"). It complies with ASME B18.3 specifications for uniformity and performance. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial uses.
