S-8077A832 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and Black Oxide finish, ideal for harsh industrial environments
• Exceptional mechanical strength delivering 70,000 psi tensile strength and 35,000 psi shear strength for reliable load-bearing performance
• Precision Class 3A thread fit ensures tight tolerances and secure fastening in demanding applications
• Knurled head texture provides enhanced grip during manual installation and removal
• Standard UNC coarse threading enables quick assembly and reduced cross-threading risks
• 5/32" hex drive compatibility allows for standardized tool usage and efficient torque application
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards for quality assurance

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw with Black Oxide finish delivers critical performance advantages in precision machinery, automation systems, and corrosive environments. The Class 3A thread fit maintains dimensional stability under vibration, while the UNC coarse thread profile resists loosening in high-stress applications. The combination of Rockwell B79 hardness and 70,000 psi tensile strength ensures reliable performance in rotating assemblies and pivot points where shoulder diameter acts as a precision spacer. The knurled socket head facilitates installation in confined spaces, making these shoulder screws ideal for manufacturing equipment, robotics, and marine applications requiring corrosion-resistant fastening solutions.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit precision. Features include: 1/4"-20 UNC coarse threads, 7/16" thread length, 5/16" shoulder diameter with -0.004" to -0.002" tolerance, and 1/8" shoulder length with ±0.005" tolerance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations.