S-93445A175 4-40 x 3/16" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Maximum holding power and secure fastening achieved through the precise Class 3A thread fit, minimizing the risk of loosening under vibration.
• High-strength and durability provided by a Rockwell B80 hardness, ensuring the screw withstands significant mechanical stress.
• Easy and secure installation with the hex drive and 0.050" drive size, allowing for high torque application without slippage.
• Effective locking capability due to the serrations and cup tip design, which bite into the mating surface for a non-slip grip.
• Broad industrial compatibility with UNC coarse threads and right-hand direction, conforming to common assembly requirements.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 4-40 UNC set screw is engineered to address critical challenges in precision assembly and machinery. The 18-8 Stainless Steel material offers excellent resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive environments, such as marine equipment, food processing machinery, and outdoor industrial fixtures. The headless design with a hex drive allows for flush mounting in confined spaces, while the Class 3A thread fit and coarse thread spacing ensure quick installation and reliable clamping force, reducing assembly time and maintenance needs. Combined with a cup tip and serrations, it provides superior anti-vibration performance, preventing components from shifting in high-stress operations like motor shafts and gear assemblies. This screw delivers consistent performance, enhancing the longevity and safety of your mechanical systems.

Specification Summary & Compliance

This set screw features a 4-40 UNC thread size with Class 3A thread fit for high precision and strength. It adheres to ASME B18.3 manufacturing standards, ensuring dimensional accuracy and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in various industrial applications without hazardous substances.