S-97345A400 8-32 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 environments and extended service life
- Precise alignment and smooth rotation ensured by the 1/4" shoulder diameter with tight tolerances for reliable assembly performance
- High-strength reliability with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding mechanical applications
- Secure, non-slip fastening provided by the knurled socket head and hex drive, allowing for high torque application without stripping
- Consistent thread engagement with Class 3A fit and UNC coarse threads for quick assembly and vibration resistance
- Broad industry compliance meeting ASME B18.3 standards, RoHS 3, and REACH regulations for safe, quality-assured use
- Versatile right-hand threading with 3/8" thread length for standard installation across various equipment and machinery
Professional Applications & Engineering Value
This 8-32 UNC thread shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 316 Stainless Steel material offers exceptional resistance to corrosion, acids, and high-moisture conditions, making it suitable for chemical processing, marine, and food-grade equipment. The knurled socket head enhances grip during installation, reducing slippage and tool wear, while the 1/4" shoulder diameter provides precise component positioning in assemblies like rotating shafts, bearings, and linkages. With a Class 3A thread fit and coarse UNC threading, it ensures rapid, secure fastening in high-vibration environments, minimizing maintenance downtime and improving operational efficiency.
Specification Summary & Compliance
This shoulder screw adheres to ASME B18.3 specifications, featuring a Class 3A thread fit for precise dimensional accuracy. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring consistent performance. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity for industrial use.
