S-91185A801 1/4"-20 x 3/8" Thumb Screws

Key Features & Benefits at a Glance

• Effortless hand-tightening and removal with a multi-lobe thumb head design for superior grip and comfort in frequent assembly applications.
• High corrosion resistance due to 18-8 Stainless Steel construction, ensuring long-term reliability in various industrial environments.
• Durable, non-marring black Acetal Plastic head that prevents surface damage and provides excellent chemical resistance.
• Precise Class 3A thread fit for secure, reliable fastening with minimal risk of cross-threading in demanding assemblies.
• Coarse UNC 1/4"-20 threading enables quick installation and removal, ideal for applications requiring frequent adjustments.
• Wide operating temperature range (32° to 180° F) for the plastic head, ensuring performance stability in diverse conditions.
• Full compliance with RoHS 3 and REACH regulations, making it safe for use in regulated industries and environmentally conscious projects.

Professional Applications & Engineering Value

This 1/4"-20 Thumb Screw combines the strength of 18-8 Stainless Steel with the user-friendly design of a multi-lobe black Acetal Plastic head, addressing common industrial challenges such as tool-free assembly and corrosion-prone environments. The fully threaded body with UNC coarse threading and Class 3A thread fit ensures rapid, secure fastening in equipment panels, electronic enclosures, and machinery guards, reducing downtime during maintenance. Its right-hand thread direction provides intuitive operation, while the plastic head offers electrical insulation and resistance to wear, making it ideal for OEM and MRO applications where speed, durability, and regulatory compliance are critical.

Specification Summary & Compliance

This thumb screw features a 1/4"-20 UNC coarse thread with Class 3A thread fit for high precision and interchangeability. It is manufactured from 18-8 Stainless Steel and includes a black Acetal Plastic multi-lobe head. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets stringent environmental and safety standards for industrial and commercial use.