S-96706A301 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, ensuring reliable performance under high-stress conditions.
• Precise alignment and pivot function provided by the 1/4" shoulder length with tight tolerances, reducing wear in rotating assemblies.
• Secure, non-slip fastening enabled by the knurled socket head and 1/8" hex drive, allowing for high-torque installation without stripping.
• Guaranteed thread reliability with UNC Class 3A fit, offering excellent vibration resistance and consistent clamping force.
• Enhanced durability from Rockwell B55 hardness, providing excellent resistance to deformation and abrasion.
• Global compliance assurance with RoHS 3 and REACH regulations, making it suitable for international supply chains and sensitive applications.

Professional Applications & Engineering Value

This 1/4"-20 UNC Class 3A shoulder screw is engineered to solve critical alignment and load-bearing challenges in industrial assemblies. The 18-8 stainless steel material offers excellent corrosion resistance, which is vital for machinery exposed to moisture, chemicals, or outdoor conditions. The shoulder diameter of 5/16" and precise shoulder length of 1/4" act as a pivot or spacer, ensuring accurate component positioning and reducing stress on threads. This design minimizes fretting and wear in applications like rotating shafts, linkages, and precision instruments. The coarse UNC thread and Class 3A thread fit provide superior vibration resistance, making it ideal for dynamic equipment. Combined with a knurled socket head for secure gripping, this screw delivers reliable performance in automotive, aerospace, and heavy machinery where dimensional accuracy and shear strength are paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Dimensional tolerances include a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring exacting dimensional accuracy. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and global industrial applications.