S-90337A326 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
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- Precise alignment and pivot functionality due to the smooth, precisely toleranced shoulder and Class 2A thread fit.
- High strength and durability from a 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load.
- Space-saving low-profile socket head with a hex drive for secure installation in confined spaces.
- Wide compatibility with standard 1/4"-20 UNC coarse threads, ensuring easy integration into existing assemblies.
- Environmental regulation compliance with RoHS 3 and REACH, making it suitable for global markets and sensitive applications.
Professional Applications & Engineering Value
This low profile socket head shoulder screw is engineered to solve critical alignment and pivot challenges in machinery, automation, and precision equipment. The 18-8 Stainless Steel material, combined with a passivated finish, provides excellent resistance to corrosion and wear, extending service life in demanding conditions. The precise shoulder with minimal diameter and length tolerances ensures accurate component positioning, reducing assembly time and preventing misalignment. The 1/4"-20 UNC coarse thread and Class 2A fit offer reliable fastening with standard tools, while the hex drive and low-profile head allow for easy access in tight spaces. Ideal for use in linkages, rotating assemblies, and guiding moving parts, this screw delivers consistent performance and reduces maintenance needs.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC thread with a Class 2A fit for standard tolerance and easy assembly. The shoulder has precise dimensions: diameter of 5/16" with a tolerance of -0.001" to 0", and length of 3/8" with a tolerance of 0" to 0.002". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for various industrial applications.
