S-97345A419 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial and marine environments.
• Precise component alignment ensured by the standard shoulder fit and Class 3A thread tolerance for reliable assembly.
• Enhanced driving torque and slip resistance from the knurled hex socket head, allowing for secure installation.
• High mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, supporting demanding applications.
• Wide compatibility with 4-40 UNC coarse threads and right-hand direction, fitting standard industrial components.
• Durable and long-lasting performance backed by Rockwell B79 hardness, reducing wear over time.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use.

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical needs in precision machinery, automation systems, and assembly jigs where alignment and corrosion resistance are paramount. The UNC coarse thread and Class 3A fit provide tight tolerances that prevent loosening under vibration, while the knurled hex socket head offers superior grip for high-torque applications without stripping. Ideal for use in industrial equipment, electronic enclosures, and medical devices, its robust shoulder design ensures accurate spacing and rotational control, reducing maintenance downtime and enhancing operational reliability in challenging environments.

Specification Summary & Compliance

This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for high accuracy, UNC coarse thread specifications, and tolerances such as shoulder diameter (-0.004" to -0.002") and length (-0.005" to 0.005"). It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for industrial use.