S-8077A156 2-56 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 316 Stainless Steel construction, ideal for harsh chemical and marine environments.
• Superior mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable load-bearing in demanding applications.
• Precise Class 3A thread fit ensures secure, vibration-resistant fastening with the 2-56 UNC coarse thread profile.
• Enhanced durability and wear resistance from the black oxide finish, which also reduces light reflection.
• Secure, non-slip installation facilitated by the knurled socket head and 5/64" hex drive for easy torque application.
• Accurate component alignment due to the standardized shoulder diameter and length with tight tolerances.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe use in regulated industries.

Professional Applications & Engineering Value

This 316 Stainless Steel shoulder screw is engineered to address critical challenges in precision assemblies, such as maintaining alignment in rotating machinery and providing a durable pivot point in linkages. The Class 3A UNC thread and coarse spacing deliver excellent engagement in metals and plastics, resisting loosening under vibration. Its black oxide finish not only enhances corrosion resistance but also minimizes galling during installation. With a Rockwell B79 hardness and robust shoulder dimensions, it ensures long-term performance in industrial applications like automation equipment, medical devices, and electronic enclosures where chemical exposure and high stress are common.

Specification Summary & Compliance

The screw features a 2-56 UNC thread with Class 3A fit for high precision, a shoulder diameter of 3/32" (tolerance: -0.004" to -0.002"), and shoulder length of 5/16" (tolerance: -0.005" to 0.005"). It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental and safety compliance for global industrial use.