S-8077A544 5/8"-11 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel and black oxide finish, ideal for harsh industrial environments
• Precise thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance in demanding applications
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for heavy-duty load-bearing requirements
• Easy installation and removal with 3/8" hex socket drive and knurled head for secure tool grip and reduced slippage
• Accurate shoulder positioning with tight diameter and length tolerances for consistent alignment in machinery and assemblies
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety
• Durable construction with Rockwell B79 hardness providing long service life under repetitive stress conditions

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical alignment and strength challenges in industrial equipment. The 316 stainless steel material, combined with a black oxide finish, provides exceptional resistance to corrosion, making it suitable for applications in chemical processing, marine, and outdoor machinery. The Class 3A thread fit and coarse UNC thread ensure secure fastening in high-vibration environments, reducing the risk of loosening. With a 3 3/4" shoulder length and precise tolerances, it offers reliable shaft positioning in rotating assemblies, pivots, and precision instruments. The socket head design with knurled texture allows for efficient installation in confined spaces, enhancing productivity in maintenance and manufacturing operations.

Specification Summary & Compliance

This shoulder screw features a 5/8"-11 UNC coarse thread with Class 3A fit for high precision. Dimensions include a shoulder diameter of 3/4" (tolerance: -0.004" to -0.002") and shoulder length of 3 3/4" (tolerance: -0.005" to 0.005"). It complies with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring reliability and safety in industrial use.