S-8077A825 1/4"-20 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life.
• Enhanced durability and wear resistance from the Black Oxide finish, which also provides a sleek, low-glare appearance.
• High-strength performance offering 70,000 PSI tensile strength and 35,000 PSI shear strength for demanding industrial applications.
• Precise and secure assembly ensured by the Class 3A thread fit, reducing the risk of loosening under vibration.
• Easy installation and removal with a 5/32" hex socket drive and knurled head for improved grip and torque application.
• Accurate alignment and spacing provided by the precision shoulder, with tight diameter and length tolerances for consistent performance.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 316 Stainless Steel Shoulder Screw is engineered to address critical challenges in industrial settings, such as misalignment, corrosion, and mechanical stress. The Black Oxide finish not only enhances corrosion resistance but also reduces friction, making it suitable for high-wear applications like machinery, automotive assemblies, and precision instruments. The Class 3A thread fit and UNC coarse thread provide reliable fastening in environments with vibration, while the knurled head and hex drive allow for secure tool engagement. Its robust 70,000 PSI tensile strength and precise shoulder dimensions ensure stable performance in pivoting mechanisms, bearing mounts, and other heavy-duty applications, reducing downtime and maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit for high precision, with a 1/4"-20 UNC coarse thread and right-hand direction. It meets ASME B18.3 specifications for dimensional accuracy, including shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.