S-91273A667 5/16"-18 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced grip and torque application thanks to the knurled head and 5/32" hex socket drive
• Precise component alignment and pivot points enabled by the 2" shoulder with tight length tolerance (±0.005")
• High mechanical strength and durability with 70,000 psi tensile strength and 35,000 psi shear strength
• Reliable and quick assembly with coarse 5/16"-18 UNC threads and Class 2A fit for consistent engagement
• Compliance with major environmental regulations, including RoHS 3 and REACH, ensuring global supply chain acceptance
• Rockwell B55 hardness provides excellent wear resistance for long-term performance in dynamic applications

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to solve critical alignment and wear challenges in precision machinery. The 2" shoulder length with minimal tolerance variation acts as a precise axle or pivot, eliminating the need for additional bushings in assemblies like conveyor systems, robotic arms, and printing equipment. The 18-8 stainless steel material offers excellent corrosion resistance, making it suitable for food processing, marine, or chemical environments where moisture is a concern. The coarse UNC thread and Class 2A fit ensure rapid, secure fastening, while the knurled hex socket head provides superior grip, even when wearing gloves. This combination of features reduces assembly time, minimizes component wear, and enhances the overall reliability of your industrial applications.

Specification Summary & Compliance

This shoulder screw features a 5/16"-18 UNC coarse thread with a Class 2A thread fit for standard industrial use. The shoulder diameter is 5/16" with a tolerance of -0.004" to -0.002", and the shoulder length is 2" with a tolerance of -0.005" to 0.005". It is manufactured from 18-8 Stainless Steel and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for global distribution and use.