S-8077A755 1/2"-13 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction for extended service life in harsh environments
• Enhanced durability and wear resistance from the black oxide finish, providing added protection against abrasion
• High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Precise alignment and smooth rotation ensured by the precisely machined 5/8" shoulder with tight diameter tolerance
• Secure installation and removal with the hex socket drive and knurled head for superior grip and torque transmission
• Reliable thread engagement due to Class 3A thread fit and coarse 1/2"-13 UNC threads for vibration resistance
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality assurance and environmental safety

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw with black oxide finish is engineered to address critical industrial challenges, particularly in applications requiring precise component alignment and high mechanical strength. The 1/2"-13 UNC coarse thread and Class 3A thread fit ensure secure fastening in high-vibration environments, preventing loosening in machinery, conveyor systems, and automotive assemblies. The 5/8" shoulder diameter with tight tolerances provides accurate locating and bearing surfaces for rotating parts, reducing wear and maintenance downtime. Its 70,000 psi tensile strength and corrosion-resistant properties make it ideal for industrial applications in chemical processing, marine equipment, and food machinery where durability and compliance with ASME B18.3 standards are paramount.

Specification Summary & Compliance

This shoulder screw features a 1/2"-13 UNC thread with Class 3A thread fit for precision and reliability. The shoulder diameter is 5/8" with a tolerance of -0.004" to -0.002", and the shoulder length is 1 1/4" with a tolerance of -0.005" to 0.005", ensuring consistent performance. Manufactured in compliance with ASME B18.3 specifications, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial use.