S-91744A540 1/4"-20 x 3/4" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Tool-free installation and removal with the spade head design for maximum hand-torque application.
- Superior corrosion resistance provided by 18-8 Stainless Steel, ideal for harsh or wash-down environments.
- Enhanced stability and load distribution from the integrated flange, reducing the risk of surface damage.
- Quick and reliable coarse threading with UNC 1/4"-20 and Class 2A fit for faster assembly in various materials.
- Full threading along the 3/4" length ensures a secure grip and consistent clamping force throughout the engagement.
- Compliance with major environmental regulations including RoHS 3 and REACH, making it suitable for global supply chains.
- Right-hand thread direction for intuitive, standard tightening operation by hand.
Professional Applications & Engineering Value
This 18-8 Stainless Steel Thumb Screw is engineered to solve common industrial challenges where tool access is limited or speed is critical. The spade head offers a large surface area for high manual torque, eliminating the need for drivers in applications like panel fastening, machinery guards, and electronic enclosures. Its flanged design acts as an integrated washer, distributing clamp load to prevent damage to soft materials and providing a more secure, vibration-resistant joint. The UNC coarse thread and Class 2A fit ensure rapid installation and reliable performance in wood, plastic, and metal assemblies, reducing assembly time and labor costs. The corrosion-resistant properties of 18-8 stainless steel make it a durable choice for outdoor equipment, food processing, and marine applications, ensuring long-term reliability with minimal maintenance.
Specification Summary & Compliance
This thumb screw features a 1/4"-20 UNC coarse thread with a Class 2A thread fit for standard tolerance and interchangeability. It is fully threaded with a length of 3/4" and includes a flange with a diameter of 0.435". The product is manufactured from 18-8 Stainless Steel and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring it is free of hazardous substances and suitable for use in regulated industries.
