S-97345A425 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 for long-term reliability in harsh environments
- Precise component alignment ensured by Class 3A thread fit and controlled shoulder diameter tolerances
- High mechanical strength delivering 70,000 psi tensile strength and 35,000 psi shear capacity for demanding applications
- Secure installation and removal with 5/64" hex socket drive and knurled head texture for improved grip
- Optimized for industrial assemblies through UNC coarse threading that resists vibration-induced loosening
- Consistent dimensional accuracy with standardized shoulder length and diameter for reliable mating with components
- Environmental compliance assurance meeting RoHS 3 and REACH regulations for global manufacturing requirements
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw addresses critical engineering challenges in precision machinery, automation systems, and industrial equipment where corrosion resistance and dimensional stability are paramount. The Class 3A thread fit provides exceptional engagement accuracy with mating components, while the UNC coarse threading maintains secure fastening under vibration-intensive conditions. The combination of 70,000 psi tensile strength and Rockwell B79 hardness ensures reliable performance in high-stress applications, from precision instruments to manufacturing fixtures. The knurled head texture and hex socket drive facilitate secure tool engagement during installation in confined spaces, making these shoulder screws ideal for applications requiring precise axial positioning and rotational control.
Specification Summary & Compliance
Manufactured to exacting standards, this shoulder screw features 4-40 UNC coarse threading with Class 3A precision fit for superior thread engagement. Critical dimensions include shoulder diameter of 1/8" (tolerance: -0.004" to -0.002") and shoulder length of 7/16" (tolerance: -0.005" to 0.005") ensuring consistent component interface. The fastener complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications requiring restricted substance compliance.
