S-8077A119 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and extended service life.
• Superior strength and durability with a 70,000 psi tensile strength and 35,000 psi shear strength, ensuring reliable performance under high-stress conditions.
• Precise alignment and smooth rotation provided by the 1-1/2" shoulder with standard fit, reducing wear on mating components.
• Enhanced wear resistance and reduced light reflection from the black oxide finish, while the knurled head improves grip during manual adjustment.
• High-precision Class 3A thread fit for secure fastening and vibration resistance in demanding applications.
• Easy installation and high torque capability with the 1/2" hex socket drive, allowing for efficient assembly with standard tools.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring quality and environmental 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 minimizes galling and seizing in high-friction environments. The 1-1/2" shoulder length provides a stable bearing surface for rotating parts like gears, pulleys, and linkages, preventing misalignment and reducing maintenance downtime. With its coarse UNC thread and Class 3A thread fit, it ensures quick assembly and reliable holding power in machinery, automotive systems, and heavy equipment. The combination of high tensile strength and Rockwell B79 hardness makes it suitable for dynamic loads and repetitive motion, offering long-term reliability and cost savings by reducing component failure.

Specification Summary & Compliance

This shoulder screw features a 3/4"-10 UNC coarse thread with a Class 3A thread fit for precise tolerance. The shoulder diameter is 1" with a tolerance of -0.004" to -0.002", and the shoulder length is 1-1/2" with a tolerance of -0.005" to 0.005", ensuring consistent performance. It is manufactured to meet ASME B18.3 specifications and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and adherence to international standards.