S-90311A135 8-32 Shoulder Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking: Integrated nylon patch thread locker maintains secure fastening from -50° to 250°F, preventing loosening in dynamic applications
• Superior corrosion resistance: 316 stainless steel construction delivers excellent performance in harsh environments and chemical exposures
• Precision alignment capability: Standard shoulder fit with 3/16" diameter and 3/8" length provides accurate component positioning and rotation control
• High-strength performance: 70,000 psi tensile strength and 35,000 psi minimum shear strength ensure reliable operation under heavy loads
• Enhanced grip and installation: Knurled head with hex socket drive allows for secure tool engagement and easy installation in confined spaces
• Precision thread engagement: Class 3A thread fit with 8-32 UNC coarse spacing ensures consistent, reliable fastening with minimal play
• Regulatory compliance assurance: Meets RoHS 3 and REACH standards for use in regulated industrial applications

Professional Applications & Engineering Value

This 8-32 UNC shoulder screw delivers exceptional engineering value in demanding industrial applications where precision alignment and vibration resistance are critical. The 316 stainless steel material provides superior corrosion resistance for harsh environments including chemical processing, marine applications, and food processing equipment. The integrated nylon patch thread locker eliminates the need for separate locking components while maintaining secure fastening across a wide temperature range from -50° to 250°F. The precision Class 3A thread fit ensures consistent engagement in assemblies requiring exact positioning, while the knurled hex socket head facilitates installation in space-constrained applications. The standardized shoulder diameter and length provide reliable bearing surfaces for rotating components, making these screws ideal for precision machinery, automation systems, and mechanical assemblies where dimensional stability and vibration resistance are paramount.

Specification Summary & Compliance

This shoulder screw features precision 8-32 UNC threads with Class 3A fit and coarse thread spacing, ensuring optimal engagement in industrial applications. The shoulder maintains tight tolerances with diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Manufactured from 316 stainless steel with Rockwell B79 hardness, the screw delivers consistent mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.