S-97345A257 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 316 stainless steel construction, ideal for harsh chemical and marine environments.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
- Precise Class 3A thread fit ensures secure, vibration-resistant assemblies with minimal play and consistent performance.
- Knurled socket head provides enhanced grip for easy installation and removal, even in tight spaces with a 5/64" hex drive.
- Robust Rockwell B79 hardness maintains thread integrity and shoulder dimensions under stress, extending service life.
- Compliance with RoHS 3 and REACH standards guarantees safety and environmental responsibility for global industrial use.
- Coarse UNC threading enables quick assembly and disassembly, reducing installation time in high-volume production.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in precision machinery, such as alignment and wear in rotating assemblies. The Class 3A thread fit and UNC coarse thread design minimize loosening under vibration, while the knurled socket head allows for secure tool engagement in confined areas. With a high tensile strength of 70,000 psi and excellent corrosion resistance, it is ideal for applications in chemical processing, marine equipment, and automated systems where reliability and durability are paramount. The precise shoulder diameter and length provide stable pivoting and spacing, reducing component wear and maintenance costs in industrial settings.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 3A precision fit for tight tolerances. Dimensions include a thread size of 4-40, shoulder diameter of 1/8" with tolerance from -0.004" to -0.002", and shoulder length of 1 7/8" with tolerance from -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for rigorous industrial use.
