S-8077A553 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life.
• Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in demanding applications.
• Precision Class 3A thread fit ensures secure, vibration-resistant fastening and consistent assembly quality.
• Enhanced grip and tool engagement from the knurled head texture and 3/8" hex drive, preventing slippage during installation.
• Durable Black Oxide finish reduces light reflection and provides added surface protection.
• Accurate shoulder positioning with controlled diameter and length tolerances for precise component alignment.
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to solve critical alignment and load-bearing challenges in heavy-duty industrial applications. The 316 Stainless Steel material provides excellent resistance to chemicals and corrosion, making it suitable for marine, chemical processing, and food industry equipment. The Black Oxide finish not only enhances durability but also minimizes glare in sensitive optical or assembly setups. With its coarse UNC threads and Class 3A fit, it ensures rapid assembly and high resistance to loosening under vibration, while the knurled socket head allows for secure tool engagement in confined spaces. The precision-machined shoulder acts as a reliable pivot or spacer in machinery, jigs, and rotating assemblies, reducing wear and maintaining operational accuracy.

Specification Summary & Compliance

This shoulder screw features a 5/8"-11 UNC thread with Class 3A precision fit, ensuring tight tolerances for secure fastening. The shoulder diameter is 3/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 1/2" with a tolerance of -0.005" to 0.005" for precise component alignment. It is manufactured in compliance with ASME B18.3 specifications and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting stringent environmental and safety regulations for industrial use.