S-97345A237 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding assemblies.
• Precise Class 3A thread fit ensures secure, vibration-resistant fastening with minimal backlash in precision equipment.
• Knurled socket head with hex drive provides a non-slip grip for easy installation and removal, even in tight spaces.
• Long 1 5/8" shoulder length allows for accurate component spacing and smooth rotational movement in linkages and pivots.
• Compliance with RoHS 3 and REACH guarantees environmental safety and unrestricted use in regulated industries.
• Coarse UNC threading enables quick assembly and disassembly, reducing installation time and labor costs.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial applications where corrosion resistance, high strength, and precision alignment are paramount. The Class 3A thread fit and tightly controlled shoulder diameter tolerance minimize play, ensuring stable performance in rotating assemblies, machinery linkages, and precision instruments. The coarse 4-40 UNC thread resists loosening under vibration, while the knurled socket head enhances tool engagement for secure fastening in confined spaces. Its robust 70,000 psi tensile strength makes it suitable for high-stress environments, from automotive components to food processing equipment, providing long-term reliability and reducing maintenance frequency.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A precision fit for consistent performance. Shoulder diameter tolerance is maintained between -0.004" to -0.002", and shoulder length tolerance from -0.005" to 0.005" to ensure exacting dimensional accuracy. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global markets and environmentally conscious applications.