S-96706A302 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and extended service life.
• Superior thread reliability with Class 3A fit, ensuring precise engagement and reducing the risk of cross-threading in assembly.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding applications requiring robust fastening.
• Secure and efficient drive provided by the knurled hex socket head, allowing for high-torque installation and reducing tool slippage.
• Precision shoulder alignment with a 5/16" diameter and 3/8" length, facilitating accurate component positioning and rotational movement.
• Broad compatibility with UNC coarse threading (1/4"-20), making it suitable for a wide range of standard industrial equipment.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global markets.

Professional Applications & Engineering Value

This 1/4-20 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 Stainless Steel material provides excellent resistance to oxidation and chemical exposure, which is vital for machinery operating in corrosive or high-moisture environments. The Class 3A thread fit ensures tight tolerances, minimizing backlash and vibration-induced loosening in dynamic systems such as rotating shafts, pivoting mechanisms, and bearing mounts. The knurled hex socket head enhances grip during installation, allowing for secure fastening even in confined spaces. With a Rockwell B55 hardness and robust shoulder design, this screw maintains dimensional stability under load, making it a reliable choice for automotive, aerospace, and manufacturing equipment where precision and longevity are paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 3A thread fit for high precision. Key dimensional tolerances include a shoulder diameter of 5/16" (tolerance: -0.004" to -0.002") and shoulder length of 3/8" (tolerance: -0.005" to 0.005"). The product is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for industrial and export applications.