S-8077A552 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.
• High tensile strength of 70,000 psi and minimum shear strength of 35,000 psi for reliable load-bearing in demanding applications.
• Precise Class 3A thread fit ensures secure, vibration-resistant fastening with minimal backlash.
• Knurled head and 3/8" hex drive provide enhanced grip and easy installation with standard tools.
• Durable shoulder design with controlled tolerances for accurate alignment and reduced wear in assemblies.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards.
• Coarse UNC threading allows for quick assembly and disassembly, improving maintenance efficiency.

Professional Applications & Engineering Value

This 5/8"-11 UNC shoulder screw is engineered to address critical challenges in precision machinery, automation systems, and heavy-duty equipment. The 316 stainless steel construction, combined with a black oxide finish, offers exceptional resistance to corrosion, chemicals, and high-moisture conditions, extending service life in industries like marine, chemical processing, and outdoor applications. The Class 3A thread fit and precisely machined shoulder—with a diameter of 3/4" and length of 2 1/8"—ensure accurate component alignment, reduce bearing surface wear, and prevent loosening under dynamic loads. Its socket head with knurling facilitates secure handling and efficient torque application, making it a reliable choice for industrial fastening where strength, durability, and compliance with ASME B18.3 standards are paramount.

Specification Summary & Compliance

This shoulder screw adheres to inch system measurement with a Class 3A thread fit and UNC coarse thread spacing for precise engagement. Key dimensions include a shoulder diameter of 3/4" (tolerance: -0.004" to -0.002") and shoulder length of 2 1/8" (tolerance: -0.005" to 0.005"), ensuring consistent performance. It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), affirming its suitability for regulated and environmentally conscious applications.