S-8077A549 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction and Black Oxide finish for extended service life in harsh environments
• Precise component alignment through 3/4" shoulder diameter with tight tolerance control for reduced assembly vibration
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Secure installation and removal with knurled socket head and 3/8" hex drive preventing tool slippage
• Reliable thread engagement with Class 3A UNC coarse threads ensuring consistent fastening performance
• Regulatory compliance assurance meeting ASME B18.3 standards and environmental regulations (RoHS 3 & REACH)
• Optimized bearing surface with 1 5/8" shoulder length providing stable rotational support for moving components

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw delivers exceptional engineering value in precision assembly applications where alignment and durability are critical. The 316 Stainless Steel construction with Black Oxide finish provides superior corrosion resistance in chemical processing, marine, and outdoor equipment applications. The knurled socket head with hex drive ensures secure tool engagement during installation, preventing damage to the fastener in high-torque scenarios. The precisely machined shoulder with controlled diameter and length tolerances serves as an accurate locating surface for rotating components in machinery, reducing wear and maintaining alignment in industrial automation systems, power transmission equipment, and precision manufacturing fixtures. The Class 3A thread fit guarantees consistent clamping force while the coarse thread pitch facilitates quicker assembly in production environments.

Specification Summary & Compliance

This shoulder screw features precision 5/8"-11 UNC coarse threads with Class 3A fit for superior thread engagement. Critical dimensions include shoulder diameter of 0.75" (tolerance: -0.004" to -0.002") and shoulder length of 1.625" (tolerance: -0.005" to 0.005"). The fastener meets ASME B18.3 specifications for dimensional accuracy and performance requirements. Material certification includes 316 Stainless Steel with Rockwell B79 hardness and mechanical properties of 70,000 psi tensile strength and 35,000 psi minimum shear strength. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries.