S-91273A197 1/4"-20 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
- Exceptional Mechanical Strength – With 70,000 psi tensile and 35,000 psi shear strength, this screw withstands high-stress applications without failure.
- Corrosion-Resistant Material – Made from 18-8 Stainless Steel, it offers excellent resistance to rust and oxidation in harsh environments.
- Precision Shoulder Design – The 1-1/4" shoulder with tight diameter tolerance ensures accurate alignment and smooth rotation in assemblies.
- High-Torque Hex Socket Drive – The 1/8" hex socket allows for maximum torque application and secure installation without stripping.
- Reliable Thread Performance – Class 2A UNC coarse threads provide easy assembly and secure fastening in various materials.
- Enhanced Grip with Knurled Head – The knurled texture improves handling during manual adjustments and prevents slippage.
- Compliant with Environmental Standards – Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
This 1/4"-20 UNC shoulder screw is engineered to address common industrial challenges such as misalignment, component wear, and fastener failure. The 18-8 Stainless Steel construction provides superior corrosion resistance, making it ideal for machinery, automotive, and electronics applications exposed to moisture or chemicals. The precision-machined shoulder acts as a pivot or spacer, reducing friction and ensuring accurate positioning in rotating assemblies. Combined with a hex socket head for high-torque installation, this screw delivers reliable performance in demanding environments, minimizing downtime and maintenance costs.
Specification Summary & Compliance
The screw features a 1/4"-20 UNC coarse thread with Class 2A fit for consistent engagement and ease of assembly. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise dimensional accuracy. Manufactured to high standards, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity.
