S-8077A295 3/8"-16 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 chemical exposure.
• Enhanced durability and wear resistance from the black oxide finish, providing a protective layer against abrasion and galling.
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance in demanding applications.
• Precise alignment and smooth rotation ensured by the Class 3A thread fit and standard shoulder fit, minimizing play and vibration.
• Secure and non-slip installation thanks to the knurled socket head and 1/4" hex drive, allowing for high-torque tightening.
• Long-lasting mechanical integrity supported by Rockwell B79 hardness, maintaining structural stability under stress.
• Broad compatibility and reliability with UNC coarse threads and a 5 1/2" shoulder length, suitable for various machinery and assembly needs.

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 failure. The black oxide finish not only enhances corrosion resistance but also reduces friction, making it ideal for rotating assemblies and precision equipment. With a Class 3A thread fit and coarse UNC threads, it ensures quick assembly and reliable holding power in high-vibration environments like automotive, aerospace, and heavy machinery. The knurled socket head and hex drive facilitate easy installation even in confined spaces, while the generous 5 1/2" shoulder length provides stable support for bearings, pulleys, and linkages, reducing wear and extending component life.

Specification Summary & Compliance

This shoulder screw adheres to ASME B18.3 specifications, ensuring dimensional accuracy and performance reliability. Threads are manufactured to Class 3A fit with 3/8"-16 UNC coarse threading, while the shoulder diameter and length maintain tight tolerances (e.g., shoulder diameter: -0.004" to -0.002"). The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing safety and environmental standards for global industrial use.