S-8077A748 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and extended service life
• Enhanced wear resistance and reduced light reflection thanks to the black oxide finish, providing long-lasting performance
• High-strength reliability with 70,000 psi tensile strength and 35,000 psi shear strength, ensuring secure fastening under heavy loads
• Precision alignment and smooth rotation facilitated by the 2 1/2" shoulder with standard fit, minimizing component wear
• Secure, high-torque installation enabled by the 5/16" hex socket drive and knurled head for superior grip
• Accurate and durable thread engagement from the 1/2"-13 UNC Class 3A coarse threads, designed for robust assembly
• Compliance with major industrial and environmental standards including ASME B18.3, RoHS 3, and REACH for guaranteed quality and safety

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial applications where precision, strength, and corrosion resistance are paramount. The black oxide finish not only enhances durability but also reduces galling and seizing in high-stress assemblies. Its UNC coarse threads and Class 3A thread fit ensure quick, reliable fastening with excellent vibration resistance, making it ideal for machinery, automotive, and heavy equipment. The 2 1/2" shoulder length provides a stable pivot or spacer, reducing wear on moving parts and maintaining alignment. With a hex drive design and knurled head, it allows for easy installation and removal even in confined spaces, boosting efficiency in maintenance and production lines.

Specification Summary & Compliance

This shoulder screw features precision 1/2"-13 UNC Class 3A threads with coarse spacing for reliable performance. Dimensions include a shoulder diameter of 5/8" (tolerance: -0.004" to -0.002") and shoulder length of 2 1/2" (tolerance: -0.005" to 0.005"), ensuring consistent fit. It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, supporting safe and sustainable industrial use.