S-97832A196 4-40 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 environments and extended service life.
- Precise alignment and secure pivoting ensured by the 1/8" shoulder with tight diameter tolerance for reliable assembly.
- High-strength performance offering 70,000 psi tensile and 35,000 psi shear strength for demanding mechanical applications.
- Easy installation and removal with the hex socket drive and knurled head, providing excellent grip and torque transmission.
- Consistent, reliable thread engagement due to the 4-40 UNC coarse thread with Class 3A fit, minimizing the risk of cross-threading.
- Enhanced durability from Rockwell B55 hardness, resisting wear and deformation under load.
- Compliance with global standards, including RoHS 3 and REACH, ensuring safety and environmental responsibility.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and pivot challenges in industrial assemblies. Its 1/8" shoulder diameter with controlled tolerances provides a precise bearing surface, eliminating misalignment in machinery, rotating components, and linkages. The 4-40 UNC coarse thread and Class 3A fit ensure fast, secure fastening with high resistance to vibration loosening, while the hex socket drive and knurled head facilitate easy handling in confined spaces. With a tensile strength of 70,000 psi and excellent corrosion resistance, it delivers long-term reliability in automotive, aerospace, and electronic equipment applications, reducing maintenance needs and downtime.
Specification Summary & Compliance
This shoulder screw features a 4-40 UNC thread with Class 3A fit for precise thread engagement, a shoulder diameter of 1/8" with a tolerance of -0.004" to -0.002", and a shoulder length of 3" with a tolerance of -0.005" to 0.005". It is manufactured from 18-8 stainless steel with a hardness of Rockwell B55 and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards for environmental safety.
