S-97008A616 1/4"-20 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Tool-free installation and removal with the easy-grip spade thumb head design, reducing assembly time and eliminating the need for specialized tools
• Superior corrosion resistance provided by the zinc-plated steel construction, ensuring long-term durability in various industrial environments
• High mechanical strength and reliability with a tensile strength of 40,000 psi and Rockwell B55 hardness, suitable for demanding applications
• Quick and secure fastening enabled by the UNC coarse threading and Class 2A thread fit, offering excellent engagement and vibration resistance
• Enhanced stability and load distribution from the integrated flange, preventing the screw from pulling through softer materials
• Full-length threading for maximum adjustability, allowing the screw to be used across a wider range of material thicknesses
• Compliance with environmental and safety standards by meeting RoHS 3 requirements, making it suitable for regulated industries

Professional Applications & Engineering Value

This zinc-plated steel thumb screw is engineered to address common challenges in industrial assembly, such as the need for rapid maintenance and tool-less adjustments. The spade head design provides an ergonomic grip, enabling operators to tighten or loosen the fastener quickly without tools, which is critical in applications requiring frequent access, like electrical enclosures, machinery guards, and automotive panels. The UNC coarse thread and Class 2A thread fit ensure reliable engagement in a variety of materials, reducing the risk of cross-threading and improving assembly efficiency. With a tensile strength of 40,000 psi and corrosion-resistant zinc plating, this screw maintains integrity under stress and in humid or outdoor conditions, making it a versatile choice for industrial fastening in manufacturing, electronics, and machinery sectors.

Specification Summary & Compliance

This thumb screw adheres to precise dimensional standards, including a 1/4"-20 UNC coarse thread with a Class 2A thread fit for consistent accuracy and ease of use. It is manufactured from zinc-plated steel, ensuring compliance with RoHS 3 (2015/863/EU) regulations for restricted substances, making it suitable for global markets. The specifications cover a length of 1", flange diameter of 0.438", and full threading, supporting reliable performance in accordance with industrial fastener norms.