S-8077A792 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 industrial environments and outdoor applications
• Enhanced durability and wear resistance from the black oxide finish, providing long-lasting performance and reduced maintenance
• Precise alignment and secure fastening with Class 3A thread fit, ensuring reliable connections in high-vibration settings
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength, suitable for heavy-duty mechanical assemblies
• Easy installation and removal using the 5/32" hex drive and knurled head, offering superior grip and torque application
• Accurate component positioning with a 2" shoulder length and tight diameter tolerance, minimizing play in rotating parts
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with black oxide finish is engineered to address critical challenges in industrial machinery, automation systems, and precision equipment. The 1/4"-20 UNC coarse threads with Class 3A fit provide exceptional thread engagement, reducing the risk of loosening under dynamic loads. The 2" shoulder length and precise diameter tolerances enable accurate alignment of bearings, gears, and linkages, minimizing wear and extending component life. With high tensile and shear strength, it supports heavy axial and radial forces in applications like conveyor systems, robotics, and assembly fixtures. The knurled head and hex drive facilitate quick installation in confined spaces, enhancing maintenance efficiency while the material resists corrosion from chemicals, moisture, and extreme temperatures.

Specification Summary & Compliance

This shoulder screw features a 1/4"-20 UNC thread with Class 3A fit for high precision, a shoulder diameter of 5/16" with tolerance of -0.004" to -0.002", and shoulder length of 2" with tolerance of -0.005" to 0.005". It meets ASME B18.3 specifications for dimensional accuracy and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for industrial use.