S-97345A422 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 industrial environments and extended service life.
- High-strength performance 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 fastening with minimal backlash for critical assemblies.
- Easy installation and removal with a 5/64" hex socket drive and knurled head for improved grip and torque application.
- Durable shoulder design with controlled diameter and length tolerances for accurate component alignment and spacing.
- Broad compliance with RoHS 3 and REACH regulations, ensuring environmental safety and global market acceptance.
- Versatile UNC coarse threading (4-40) provides quick assembly and high resistance to loosening under dynamic loads.
Professional Applications & Engineering Value
This 316 Stainless Steel Shoulder Screw is engineered to address critical challenges in precision machinery, automation systems, and medical devices where alignment, corrosion, and mechanical stress are concerns. The Class 3A thread fit and UNC coarse threads deliver exceptional clamping force and vibration resistance, reducing maintenance needs in high-cycle applications. The knurled socket head allows for secure tool engagement, preventing cam-out during torque-intensive assembly. With a hardness of Rockwell B79 and robust shoulder dimensions, it provides reliable pivoting, locating, and spacing functions, making it a trusted component in assemblies requiring repeatable accuracy and corrosion resistance.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a 4-40 thread size and Class 3A precision fit for tight tolerances. Shoulder diameter and length are manufactured to precise specifications, with tolerances of -0.004" to -0.002" and -0.005" to 0.005", respectively. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial use.
