S-97832A314 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 18-8 stainless steel construction, ideal for harsh industrial environments.
- Precise alignment and smooth rotation enabled by the 1 5/8" shoulder with controlled diameter tolerance.
- High-strength performance with a tensile strength of 70,000 psi and shear strength of 35,000 psi for demanding applications.
- Secure and reliable fastening ensured by the Class 3A thread fit for tight, vibration-resistant assemblies.
- Easy installation and removal with a knurled socket head and 5/32" hex drive, preventing tool slippage.
- Broad compatibility with the 1/4"-20 UNC coarse thread, a common standard for various machinery and equipment.
- Regulatory peace of mind through compliance with ASME B18.3, RoHS 3, and REACH standards.
Professional Applications & Engineering Value
This shoulder screw is engineered to address critical alignment and pivot point requirements in industrial applications. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, extending service life in demanding conditions. The 1 5/8" shoulder length acts as a precise datum for locating parts like gears, pulleys, and linkages, minimizing wear and ensuring smooth rotational movement. The Class 3A thread fit and UNC coarse thread offer superior holding power and are less prone to cross-threading, making assembly faster and more reliable. The knurled socket head with a hex drive allows for high-torque installation without cam-out, which is crucial for maintenance and assembly lines where efficiency and durability are paramount.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC coarse thread with a Class 3A fit for high precision. The shoulder diameter tolerance is -0.004" to -0.002", and the shoulder length tolerance is -0.005" to 0.005", ensuring consistent performance. It is manufactured in accordance with ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.
