S-90778A422 1/4"-20 x 3/4" ASME B18.3 Set Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel construction, ideal for harsh environments and chemical exposure
• Exceptional holding power with Class 3A thread fit ensuring tighter tolerances and more reliable, vibration-resistant connections
• Secure, deep-gripping fastening provided by the 90° cone point, which bites into materials to prevent component slippage
• High durability and strength backed by Rockwell B80 hardness, resisting wear and deformation under load
• Easy installation in confined spaces with the headless hex drive design, allowing flush mounting and tool access with a 1/8" hex key
• Reliable coarse UNC threading for quick assembly and reduced cross-threading risk in industrial applications
• Full regulatory compliance meeting ASME B18.3, RoHS 3, and REACH standards for safe, quality-assured use

Professional Applications & Engineering Value

This 316 stainless steel set screw is engineered to solve critical fastening challenges in demanding sectors like marine, chemical processing, and food machinery, where corrosion resistance is paramount. The headless hex drive and cone point design allow for secure, low-profile fastening in pulleys, gears, and collars, preventing axial movement even under high vibration. With its UNC coarse thread and Class 3A fit, it ensures rapid, precise installation and maintains clamping force, reducing maintenance needs and downtime. The Rockwell B80 hardness further enhances longevity, making it a reliable choice for permanent or semi-permanent assemblies in harsh industrial environments.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC coarse thread with Class 3A thread fit for high precision, a length of 3/4", and a 90° cone point. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and quality for industrial use.