S-91273A206 3/8"-16 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 from 18-8 Stainless Steel construction, ideal for harsh environments and extended service life.
- Precise component alignment with a generous 2-1/4" shoulder length, minimizing part movement and wear.
- High mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for demanding, heavy-duty applications.
- Enhanced grip and reduced tool slippage due to the knurled head texture on the standard socket head.
- Reliable and fast assembly with a coarse UNC thread and Class 2A fit, ensuring consistent engagement and ease of use.
- Durable wear resistance provided by a Rockwell B55 hardness, maintaining integrity under repeated stress.
- Compliance with environmental and safety standards, being RoHS 3 and REACH compliant for global market suitability.
Professional Applications & Engineering Value
This 18-8 Stainless Steel shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 3/8"-16 UNC coarse thread and Class 2A thread fit provide secure fastening with minimal risk of cross-threading, while the 2-1/4" shoulder length offers a stable pivot or bearing surface for precise machinery assembly. The knurled socket head enhances torque application, reducing slippage during installation in high-vibration environments like automotive jigs, conveyor systems, and robotic arms. Its high tensile and shear strength ensures reliable performance under heavy loads, making it a top choice for applications requiring corrosion resistance and long-term mechanical stability without frequent maintenance.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise fits in assemblies. Manufactured from 18-8 Stainless Steel, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting use in regulated industries without hazardous substances.
