S-92952A150 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments and washdown applications.
• Exceptional hand-tightening control provided by the knurled, round head, eliminating the need for tools in frequent adjustment scenarios.
• High mechanical strength and durability from a 70,000 psi tensile strength and Rockwell B83 hardness, ensuring reliable performance under load.
• Precise component alignment and pivoting enabled by the 3/8" shoulder with precise fit tolerances, reducing wear and simplifying assembly.
• Wide compatibility and reliable fastening with a standard 4-40 UNC coarse thread and Class 2A fit, ensuring consistent engagement and ease of use.
• Compliance with global environmental standards including RoHS 3 and REACH, making it suitable for regulated industries and international supply chains.
• Versatile drive options with an integrated 5/64" hex drive, offering flexibility for both manual and tool-assisted installation.

Professional Applications & Engineering Value

This 4-40 UNC Stainless Steel Thumb Screw is engineered to solve critical challenges in precision assembly and machinery. The 18-8 Stainless Steel material provides excellent corrosion resistance, making it ideal for applications in electronics, medical devices, and food processing equipment where exposure to moisture and chemicals is common. The 3/8" shoulder length with precise tolerances acts as a built-in spacer or pivot, ensuring accurate alignment of components and reducing stress on the threads. This design minimizes backlash and wear in moving parts, extending equipment life. The knurled round head and hex drive offer dual functionality, allowing for quick hand-tightening in hard-to-reach areas or secure tool-fastening for high-torque requirements. Its right-hand thread and coarse thread spacing ensure rapid installation and removal, boosting efficiency in maintenance and production lines.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent, reliable fastening. The shoulder features a diameter of 1/8" with a tolerance of -0.001" to 0" and a length of 3/8" with a tolerance of 0" to 0.002", ensuring precise fit in demanding applications. 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.