S-91273A234 1/2"-13 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for heavy-duty applications
• Precise component alignment ensured by the 2 1/2" shoulder with tight length tolerance for reduced vibration and wear
• Easy installation and removal via the 1/4" hex socket drive and knurled head for secure tool grip
• Reliable thread engagement with Class 2A UNC coarse threads providing quick assembly and resistance to loosening
• Consistent performance backed by Rockwell B55 hardness for durability under repetitive stress
• Compliance with global standards including RoHS 3 and REACH for safe use in regulated industries

Professional Applications & Engineering Value

This socket head shoulder screw is engineered to address critical alignment and strength challenges in industrial applications such as machinery assemblies, pivoting mechanisms, and precision equipment. The 18-8 stainless steel material offers excellent resistance to corrosion and oxidation, extending service life in demanding conditions. The 2 1/2" shoulder length with minimal tolerance ensures accurate positioning of moving parts, reducing misalignment and component wear. Combined with the 1/2"-13 UNC coarse thread and Class 2A fit, it facilitates rapid assembly while maintaining high shear and tensile strength, making it a reliable choice for heavy-duty mechanical systems.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent fastening. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise dimensional accuracy. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming its suitability for environmentally conscious and regulated industrial use.