S-97768A130 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
- Exceptional corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
- High tensile and shear strength (70,000 psi tensile, 35,000 psi minimum shear) for reliable performance in demanding applications.
- Precise Class 3A thread fit ensures tight tolerances and secure fastening, reducing the risk of loosening under vibration.
- Easy installation and removal with a hex drive socket head and knurled texture for improved grip and torque application.
- Durable shoulder design with controlled diameter and length tolerances for accurate alignment and bearing surfaces.
- Rockwell B55 hardness provides excellent wear resistance and long-term durability in mechanical assemblies.
- Compliance with RoHS 3 and REACH standards ensures safety and environmental responsibility for global industrial use.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address common challenges in precision machinery, such as misalignment and component wear. Made from 18-8 stainless steel with a black oxide finish, it resists rust and corrosion in humid or chemically aggressive settings, extending service life. The Class 3A thread fit and coarse UNC thread provide secure, vibration-resistant connections, while the knurled socket head allows for efficient torque transfer during assembly. Ideal for applications in robotics, automotive systems, and industrial equipment, this screw offers reliable shoulder diameter and length tolerances for precise positioning of moving parts, reducing maintenance needs and enhancing operational efficiency.
Specification Summary & Compliance
This shoulder screw features a 4-40 UNC thread with Class 3A fit for high precision, along with a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.
