S-90778A189 8-32 x 1/2" 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, minimizing the risk of loosening under vibration
• High-strength performance with Rockwell B80 hardness, providing reliable clamping force and durability
• Easy installation and removal with the 5/64" hex drive, allowing for efficient assembly and maintenance
• Effective component positioning thanks to the 90° cone point, which bites into surfaces for a firm, non-slip grip
• Broad industrial compatibility with UNC coarse threads and right-hand direction, suitable for standard applications
• Regulatory compliance and safety meeting ASME B18.3 standards, RoHS 3, and REACH for environmentally conscious use

Professional Applications & Engineering Value

This 8-32 UNC set screw in 316 stainless steel is engineered to address critical challenges in industrial settings, such as corrosion from chemicals, moisture, and high temperatures. Its headless design and hex drive enable flush mounting in tight spaces, while the coarse thread spacing and Class 3A thread fit provide quick assembly and vibration resistance in machinery, automotive, and marine applications. The 90° cone point angle ensures minimal surface damage and reliable torque transmission, making it ideal for securing collars, gears, and pulleys without slippage. By combining robust materials with precise engineering, this screw reduces maintenance downtime and enhances operational reliability in demanding environments.

Specification Summary & Compliance

This set screw features a thread size of 8-32 with UNC coarse spacing and a Class 3A thread fit for high precision. It complies with ASME B18.3 manufacturing standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations. Dimensions include a 1/2" length, 0.164" thread diameter, and 5/64" hex drive size, with a cone point tip and right-hand thread direction for consistent performance.