S-92845A001 4-40 x 1/8" 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 the Class 3A thread fit, minimizing the risk of loosening under vibration.
• High-strength durability with a Rockwell B80 hardness, providing reliable performance in demanding applications.
• Easy and efficient installation using the 0.050" hex drive, allowing for high torque application in confined spaces.
• Enhanced grip and positioning from the extended tip design, improving component alignment and holding power.
• Broad industrial compatibility with UNC coarse threads and right-hand direction, conforming to common assembly standards.
• Compliance with major safety and environmental regulations including RoHS 3 and REACH, ensuring responsible sourcing and use.

Professional Applications & Engineering Value

This 4-40 UNC set screw in 316 Stainless Steel is engineered to address critical challenges in precision assemblies where corrosion resistance and vibration resistance are paramount. The headless design and hex drive facilitate flush mounting and high-torque installation in tight spaces, preventing protrusion and interference. Its Class 3A thread fit and coarse thread spacing ensure a tight, reliable hold in materials like metals and plastics, reducing the risk of thread stripping and loosening over time. The extended tip provides a positive bite into the shaft or component, enhancing torque transmission and rotational security in machinery, automotive, and electronic enclosures. Manufactured to ASME B18.3 specifications, it delivers consistent quality for OEM and MRO applications, ensuring long-term assembly integrity and reduced maintenance needs.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and a thread size of 4-40 UNC with coarse spacing. The extended tip features a diameter of 0.075" and length of 0.03" with specified tolerances. It meets ASME B18.3 manufacturing specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.