S-92158A127 4-40 x 1/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments and extended service life
• Precise and secure fastening ensured by Class 3A thread fit, providing excellent dimensional accuracy and vibration resistance
• High mechanical strength with a Rockwell B80 hardness rating, offering reliable performance under load
• Easy and efficient installation with a hex drive (0.050") and headless design, allowing for flush mounting in tight spaces
• Effective torque transmission from the coarse UNC thread spacing and flat tip, preventing component slippage
• Broad industrial compliance meeting ASME B18.3 standards, RoHS 3, and REACH regulations for safe, global use
• Versatile right-hand thread direction compatible with standard assembly practices for quick integration

Professional Applications & Engineering Value

This 4-40 UNC set screw is engineered to address critical industrial fastening challenges where space constraints and corrosion are concerns. The headless design and compact 1/4" length allow for seamless integration into assemblies requiring a flush finish, such as in precision machinery, electrical enclosures, and automotive components. Manufactured from 316 stainless steel, it provides exceptional resistance to chemicals, moisture, and high temperatures, reducing maintenance costs and downtime in demanding environments. The Class 3A thread fit and coarse thread spacing ensure a tight, reliable grip, minimizing the risk of loosening due to vibrations—a common issue in dynamic applications. Combined with a hex drive for straightforward installation, this set screw delivers consistent performance in OEM and MRO settings, enhancing the durability and safety of your equipment.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for high accuracy and a UNC thread type with 4-40 size. It conforms to ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity for industrial use.