S-92785A443 1/4"-20 x 1" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and reducing long-term maintenance costs.
• Exceptional holding power provided by the 90° cone point, which bites securely into materials to prevent component slippage.
• Precise and reliable thread engagement ensured by the Class 3A thread fit, minimizing the risk of cross-threading and assembly failures.
• High-strength durability from a Rockwell B80 hardness rating, offering excellent resistance to wear and deformation under load.
• Easy and secure installation with a hex drive style, allowing for high torque application and a flush, headless finish.
• Broad industrial compatibility with a standard 1/4"-20 UNC coarse thread, ensuring easy replacement and interchangeability.
• Regulatory peace of mind by meeting ASME B18.3, RoHS 3, and REACH standards for quality and environmental safety.

Professional Applications & Engineering Value

This 1/4-20 UNC hex headless set screw is engineered to solve critical challenges in precision assembly and motion control systems. The 18-8 Stainless Steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for applications in food processing, marine, and outdoor equipment where moisture is a concern. The headless design and cone point are specifically valuable in securing collars, gears, and pulleys onto shafts, preventing axial movement without protruding, which is essential in rotating machinery and compact assemblies. The Class 3A thread fit and coarse thread spacing ensure quick assembly and a secure, vibration-resistant hold, reducing the need for frequent retightening in high-stress environments. This combination of features delivers reliable performance, minimizes downtime, and extends the service life of your mechanical systems.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for superior thread engagement and a 1/4"-20 UNC coarse thread with right-hand direction. Manufacturing and quality are governed by the ASME B18.3 specification. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in regulated industries.