S-90298A147 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 industrial environments.
- Precise alignment and secure positioning thanks to the 1/8" diameter shoulder with tight tolerance control.
- High-strength performance delivering 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
- Exceptional thread reliability with Class 3A UNC coarse threads ensuring secure, vibration-resistant fastening.
- Easy and secure installation using a standard hex drive (5/64") and knurled head for improved grip during assembly.
- Long-term durability supported by Rockwell B55 hardness, maintaining integrity under repeated use.
- Compliance with global regulations, including RoHS 3 and REACH, ensuring safe and sustainable use.
Professional Applications & Engineering Value
This 18-8 Stainless Steel Shoulder Screw is engineered to address critical alignment and durability challenges in industrial settings. Its 1" shoulder length and 1/8" shoulder diameter provide a stable pivot or spacer in machinery, reducing misalignment and wear in assemblies like rotating shafts, linkages, and precision instruments. The Class 3A UNC thread and coarse threading enhance grip and resistance to loosening under vibration, while the socket head with hex drive allows for easy torque application in confined spaces. Made from corrosion-resistant 18-8 Stainless Steel, it withstands moisture and chemicals, making it ideal for automotive, aerospace, and electronics applications where reliability and longevity are paramount.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring consistent performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and safety standards in industrial use.
