S-90298A844 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, ideal for harsh industrial environments
• Precise component alignment ensured by the 3/4" shoulder diameter with tight tolerance of -0.001" to 0.001"
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for heavy-duty applications
• Reliable thread engagement with Class 3A thread fit and 5/8"-11 UNC coarse threads for secure fastening
• Easy installation and adjustment featuring a knurled socket head with 3/8" hex drive for non-slip tool engagement
• Extended service life through durable construction meeting ASME B18.3 standards for consistent performance
• Environmental compliance with RoHS 3 and REACH regulations for safe use across global markets

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw delivers exceptional engineering value in precision machinery and industrial equipment. The 18-8 stainless steel construction with passivated finish provides superior corrosion resistance, critical for applications exposed to moisture, chemicals, or outdoor elements. The precisely machined shoulder diameter of 3/4" with minimal tolerance ensures accurate component alignment in rotating assemblies, bearings, and pivoting mechanisms, eliminating the need for additional alignment components. The Class 3A thread fit with coarse UNC threads maintains secure fastening even under vibration and dynamic loads, while the 2 1/4" shoulder length provides ample support for moving parts. The knurled socket head with 3/8" hex drive allows for reliable tool engagement in confined spaces, making these shoulder screws ideal for automation equipment, conveyor systems, and precision manufacturing applications where dimensional accuracy and durability are paramount.

Specification Summary & Compliance

This precision shoulder screw features Class 3A thread fit with 5/8"-11 UNC coarse threads and maintains dimensional accuracy with shoulder diameter tolerance of -0.001" to 0.001" and shoulder length tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications, it ensures consistent performance in industrial applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, meeting global regulatory requirements for hazardous substance restrictions.