S-91273A911 5-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
• Enhanced torque transmission and reduced cam-out thanks to the knurled hex socket head design.
• High tensile strength of 70,000 psi ensures reliable performance under heavy loads.
• Precise component alignment and spacing enabled by the consistent 1/8" shoulder diameter.
• Easy assembly and disassembly with standard UNC coarse threads and Class 2A thread fit.
• Long-term durability supported by Rockwell B55 hardness and a minimum shear strength of 35,000 psi.
• Compliance with global environmental standards, including RoHS 3 and REACH, for safe and responsible use.

Professional Applications & Engineering Value

This 18-8 Stainless Steel Shoulder Screw is engineered to address critical challenges in precision assembly and machinery. The 1/8" shoulder diameter provides a reliable pivot point or spacer in applications like rotating assemblies, linkages, and electronic enclosures, ensuring accurate alignment and reducing wear. The 5-40 UNC coarse threads offer quick installation and high resistance to vibration loosening, while the knurled hex socket head allows for secure driving with standard tools, minimizing slippage. Made from corrosion-resistant stainless steel, it withstands exposure to moisture and chemicals, making it ideal for automotive, aerospace, and industrial equipment where durability and compliance with RoHS and REACH are paramount.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit for standard tolerance and easy assembly, with a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for precision. It adheres to UNC thread standards and is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and reliability in industrial applications.