S-97345A859 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 chemical exposure
• Exceptional mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for heavy-duty load-bearing applications
• Precision Class 3A thread fit ensures tight, secure fastening with minimal backlash in critical assemblies
• Knurled head texture provides enhanced grip during manual installation and adjustment
• Standard hex drive compatibility with 3/8" drive allows for easy installation using common industrial tools
• Accurate shoulder dimensions with controlled tolerances for precise component alignment and rotational stability
• Full regulatory compliance meeting ASME B18.3 specifications and environmental standards (RoHS 3, REACH)

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers critical performance in demanding industrial applications where corrosion resistance and precision alignment are paramount. The UNC coarse thread with Class 3A fit provides superior engagement in soft materials and high-vibration environments, while the knurled socket head ensures secure tool engagement during repeated maintenance cycles. The precisely machined shoulder serves as both a locating diameter and rotational bearing surface, eliminating the need for additional bushings in machinery, conveyor systems, and precision equipment. With Rockwell B79 hardness and exceptional tensile strength, this socket head shoulder screw maintains dimensional stability under heavy loads, making it ideal for manufacturing fixtures, automotive assemblies, and material handling equipment exposed to corrosive agents.

Specification Summary & Compliance

This shoulder screw features 5/8"-11 UNC coarse threads with Class 3A thread fit for precision engagement. Critical dimensions include a 1" head diameter, 1/2" head height, and a shoulder diameter of 3/4" with tight tolerance control (-0.004" to -0.002"). The shoulder length measures 1 1/4" with minimal variation (-0.005" to 0.005"). Manufactured in compliance with ASME B18.3 specifications and certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental responsibility and regulatory adherence for global industrial applications.