S-91185A817 1/4"-20 x 1 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual operation with multi-lobe head design for superior grip and torque application without tools
• Corrosion-resistant performance due to 18-8 stainless steel construction, ideal for humid or demanding environments
• Durable, lightweight head made from black acetal plastic, offering excellent impact resistance and reduced overall weight
• Precise thread engagement with Class 3A fit and UNC coarse threads for reliable fastening and vibration resistance
• Wide temperature tolerance with head operating from 32° to 180°F, suitable for various indoor industrial settings
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Versatile partial threading allowing for adjustable clamping and easier alignment in assembly applications

Professional Applications & Engineering Value

This 1/4"-20 thumb screw combines 18-8 stainless steel with a black acetal plastic multi-lobe head to address common industrial challenges like frequent adjustments and exposure to moisture. The partially threaded design enables quick installation and secure holding in machinery, electronic enclosures, and fixture assemblies. Its coarse UNC threads and Class 3A thread fit ensure minimal cross-threading and consistent performance in high-vibration environments. The acetal head resists chemicals and wear, while the stainless body prevents rust, reducing maintenance costs and downtime in industrial applications.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy. It is partially threaded with a minimum thread length of 1" and overall length of 1 3/4". Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial and commercial use.