S-90311A134 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch thread locker, ensuring secure fastening in high-stress environments from -50° to 250°F.
• Superior corrosion resistance from 316 stainless steel material, ideal for harsh industrial and marine applications.
• High tensile and shear strength with 70,000 psi tensile and 35,000 psi minimum shear strength for reliable load-bearing performance.
• Precision Class 3A thread fit for tight tolerances and smooth assembly in demanding UNC coarse threading applications.
• Easy installation and grip with a knurled socket head and 3/32" hex drive, reducing slippage during torque application.
• Durable shoulder design featuring a 3/16" diameter shoulder with controlled tolerances for accurate component alignment.
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.

Professional Applications & Engineering Value

This 8-32 UNC thread shoulder screw is engineered to address common industrial challenges such as vibration loosening and corrosion in machinery, automation, and assembly systems. The 316 stainless steel construction provides exceptional resistance to chemicals and moisture, while the nylon patch thread locker offers a permanent locking solution that eliminates the need for additional adhesives. With its coarse threading and Class 3A fit, it ensures quick, precise installation in high-volume production environments, reducing downtime and maintenance costs. The knurled socket head enhances grip for efficient torque application, making it a reliable choice for heavy-duty fastening in automotive, aerospace, and electronic enclosures where durability and compliance are critical.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a precise Class 3A thread fit for minimal play and high reliability. Dimensions include a shoulder diameter of 3/16" with tight tolerances (-0.004" to -0.002") and a shoulder length of 5/16" (±0.005"). It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for international industrial applications.