S-96655A112 4-40 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.
• Enhanced installation grip from the knurled hex socket head, reducing tool slippage and improving assembly efficiency.
• High tensile strength of 70,000 psi ensures dependable performance under heavy loads and mechanical stress.
• Precise alignment and spacing with a 1/4" shoulder diameter and 3/4" shoulder length, minimizing part movement in assemblies.
• Durable thread engagement using 4-40 UNC coarse threading and Class 2B fit for consistent fastening in various materials.
• Rockwell B55 hardness provides excellent wear resistance, maintaining integrity through repeated use.
• Environmental compliance with RoHS 3 and REACH standards, ensuring safety and regulatory adherence for global markets.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address critical challenges in precision assemblies, such as misalignment and component wear. The partially threaded design with a 1/4" shoulder diameter and 3/4" shoulder length allows for exact positioning in machinery, pivots, and rotating parts, reducing the need for additional bushings. Made from 18-8 Stainless Steel, it offers inherent corrosion resistance, making it suitable for industrial, automotive, and electronic applications where exposure to moisture or chemicals is common. The hex socket drive with a knurled head ensures secure tool engagement, speeding up installation while minimizing stripping. Combined with a 70,000 psi tensile strength and coarse UNC threading, this fastener delivers reliable performance in high-stress environments, enhancing overall assembly durability and reducing maintenance costs.

Specification Summary & Compliance

This shoulder screw adheres to UNC thread standards with a 4-40 thread size and Class 2B thread fit for precise tolerance. The shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring consistent dimensional accuracy. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, confirming it is free from hazardous substances and safe for various industrial uses.