S-97345A598 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.
- High-strength performance offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
- Precise alignment and smooth rotation ensured by the 3/8" shoulder diameter with tight tolerances for reduced wear.
- Secure, non-slip fastening with a knurled socket head and 3/16" hex drive, providing excellent grip during installation.
- Fine UNF threading (1/4"-28) with Class 3A fit for vibration resistance and leak-proof connections in precision assemblies.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
- Durable material hardness rated at Rockwell B79, resisting deformation under stress for long-term reliability.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial settings, such as misalignment and corrosion-induced failure. Its fine UNF thread (1/4"-28) and Class 3A thread fit provide superior vibration resistance, making it ideal for precision machinery, automotive components, and electronic enclosures where loosening can lead to operational downtime. The knurled socket head enhances tool grip, reducing installation errors, while the 3/8" shoulder diameter acts as a reliable pivot or spacer, minimizing part wear. With high tensile and shear strength, it supports heavy-duty applications in marine, chemical, and food processing industries, ensuring durability and compliance with ASME B18.3 standards for consistent performance.
Specification Summary & Compliance
This shoulder screw features a 1/4"-28 UNF fine thread with Class 3A thread fit for precise engagement, and a shoulder diameter of 3/8" with tolerances from -0.004" to -0.002". It meets ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for global industrial use.
