S-91273A253 5/8"-11 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction for reliable performance in harsh industrial environments
• Enhanced torque transmission through the knurled hex socket head design, preventing tool slippage during installation
• Precise component alignment with 5/8" shoulder diameter and 1-3/8" shoulder length for accurate positioning in assemblies
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Consistent thread engagement through Class 2A thread fit and UNC coarse threads for reliable fastening performance
• Durable mechanical properties with Rockwell B55 hardness ensuring long-term wear resistance and structural integrity
• Environmental compliance meeting RoHS 3 and REACH standards for safe use across global markets

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw delivers exceptional engineering value in precision mechanical assemblies where alignment and rotational control are critical. The 18-8 Stainless Steel construction provides excellent corrosion resistance for applications exposed to moisture, chemicals, or outdoor elements. The knurled hex socket head ensures positive tool engagement, eliminating cam-out issues during high-torque installation. The precisely machined shoulder with tight diameter tolerances serves as a bearing surface or pivot point in machinery, reducing wear on mating components. These industrial shoulder screws are engineered to maintain dimensional stability under heavy loads, making them ideal for rotating assemblies, gear mechanisms, and precision positioning systems where 70,000 psi tensile strength and reliable performance are essential.

Specification Summary & Compliance

This shoulder screw features Class 2A thread fit with UNC coarse threads (5/8"-11) and right-hand thread direction. The shoulder maintains precise dimensional control with diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". Manufactured to industry standards with Rockwell B55 hardness and mechanical properties including 70,000 psi tensile strength and 35,000 psi minimum shear strength. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring environmental responsibility and regulatory acceptance for industrial applications worldwide.