S-91273A292 1"-8 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and long-term reliability.
• Precise component alignment ensured by the 2" shoulder with tight diameter and length tolerances, reducing assembly errors.
• High-torque installation capability via the 1/2" hex drive and knurled head, providing a secure grip and preventing tool slippage.
• Exceptional mechanical strength with 70,000 psi tensile and 35,000 psi shear strength, supporting heavy-duty applications without failure.
• Consistent thread engagement due to Class 2A fit and coarse 1"-8 UNC threads, enabling quick assembly and vibration resistance.
• Durable wear resistance from Rockwell B55 hardness, maintaining integrity under repeated use and stress.
• Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.

Professional Applications & Engineering Value

This 18-8 stainless steel shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial settings. The 1"-8 UNC coarse thread with Class 2A fit ensures reliable fastening in high-vibration environments, such as machinery, automotive assemblies, and conveyor systems, where loosening can lead to operational failures. The 2" shoulder length with precise tolerances provides a stable pivot or spacer, minimizing misalignment in rotating parts like bearings and pulleys. Combined with a 1/2" hex drive and knurled head, it allows for secure installation with standard tools, reducing assembly time and enhancing safety. Its high tensile and shear strength makes it suitable for demanding applications, ensuring longevity and reducing maintenance costs in precision engineering projects.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. The shoulder features a diameter of 1" with a tolerance of -0.004" to -0.002" and a length of 2" with a tolerance of -0.005" to 0.005", ensuring precise fits. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial use without hazardous substances.