S-90298A846 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Precise component alignment through Class 3A thread fit and tight shoulder diameter tolerance (±0.001") ensuring reliable assembly
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications
• Secure installation and removal via 3/8" hex drive socket and knurled head design for superior torque transmission
• Optimized for industrial machinery with UNC coarse threads providing rapid assembly and vibration resistance
• Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards (RoHS 3, REACH)
• Versatile shoulder design featuring 2 3/4" shoulder length for precise pivot points and rotational applications

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw delivers critical engineering solutions for precision machinery and industrial equipment. The Class 3A thread fit combined with UNC coarse threading ensures secure fastening in high-vibration environments while facilitating rapid assembly. The passivated finish enhances corrosion resistance in manufacturing settings exposed to coolants, moisture, or chemicals. The substantial 2 3/4" shoulder length provides accurate bearing surfaces for rotating components, making it ideal for pivot points, mechanical linkages, and precision alignment applications. With 70,000 psi tensile strength, this socket head shoulder screw maintains structural integrity under heavy loads, while the knurled head texture and 3/8" hex drive prevent tool slippage during installation in confined spaces.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and tight shoulder tolerances (diameter: -0.001" to 0.001", length: -0.005" to 0.005"). Features 5/8"-11 UNC coarse threads with 0.625" diameter and 7/8" thread length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Material certification includes 18-8 stainless steel with Rockwell B55 hardness and 70,000 psi tensile strength rating.