S-96126A121 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish, ideal for harsh environments and extended service life
• Precise alignment and pivot points due to the accurate 1/8" shoulder diameter with tight tolerances, reducing assembly errors and improving mechanical performance
• High strength and durability with 70,000 psi tensile strength and Rockwell B79 hardness, ensuring reliable performance under heavy loads
• Easy installation and removal using a standard 5/64" hex drive socket head, minimizing tool slippage and speeding up assembly processes
• Wide compatibility with 4-40 UNC coarse threads and Class 2A fit, facilitating secure fastening in various industrial applications
• Regulatory compliance assurance meeting RoHS 3 and REACH standards, supporting sustainable and safe manufacturing practices
• Cost-effective maintenance with right-hand thread design and smooth head texture, enabling quick disassembly for repairs and adjustments

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw is engineered to address common industrial challenges, such as misalignment and corrosion-induced failures. The precise shoulder diameter and length tolerances ensure accurate positioning in assemblies, reducing wear and improving the lifespan of moving parts in machinery. With a passivated finish, it offers enhanced protection against chemicals and moisture, making it suitable for demanding environments like mechanical assemblies, automotive systems, and precision instruments. The 4-40 UNC coarse thread and hex drive design allow for efficient installation, while the high tensile strength supports heavy-duty applications without compromising integrity.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit and UNC standards for consistent performance. Key dimensions include a shoulder diameter of 1/8" with tolerances from -0.001" to 0", and shoulder length of 3/32" with 0" to 0.002" tolerance. It is manufactured to comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met.