S-96126A131 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel and passivated finish, ideal for harsh environments and extended service life.
• High-strength performance offering 70,000 psi tensile strength and Rockwell B79 hardness for reliable load-bearing in demanding applications.
• Precise shoulder fit with a diameter tolerance of -0.001" to 0" and length tolerance of 0" to 0.002", ensuring accurate alignment and reduced wear.
• Easy installation and removal using a standard 5/64" hex socket drive, providing secure torque transfer and minimizing tool slippage.
• Wide compatibility with 4-40 UNC coarse threads and Class 2A fit, facilitating quick assembly and interchangeability in various industrial setups.
• Environmental compliance meeting RoHS 3 and REACH standards, ensuring safe use in regulated markets and sustainable operations.
• Durable smooth head design with a 0.25" diameter and standard socket profile, offering a flush finish and resistance to snagging.

Professional Applications & Engineering Value

This 4-40 UNC shoulder screw is engineered from 316 Stainless Steel to address common industrial challenges like corrosion, misalignment, and mechanical stress. The 1" shoulder length provides a stable pivot or spacer in assemblies, reducing friction and wear in machinery components such as rotating shafts, linkages, and precision instruments. The passivated finish enhances surface durability against chemicals and moisture, while the hex socket head allows for tight spaces and high-torque applications. Ideal for sectors like automotive, aerospace, and manufacturing, it ensures reliable performance in demanding environments where precision and longevity are critical, supported by its coarse right-hand thread for efficient fastening.

Specification Summary & Compliance

The screw features a Class 2A thread fit per UNC standards, with precise shoulder dimensions (diameter: 1/8", length: 1") and tolerances for accurate assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety guidelines. Manufactured to deliver consistent 70,000 psi tensile strength and Rockwell B79 hardness, it meets industrial requirements for durability and performance in technical applications.