S-91830A581 1/4"-20 x 1" 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
- Superior grip and torque application with a fully knurled round head and raised profile for secure hand-tightening without tools
- Excellent corrosion resistance and durability from 18-8 Stainless Steel construction, ideal for harsh industrial environments
- High mechanical strength and reliability with a Rockwell B83 hardness and 80,000 psi tensile strength for demanding applications
- Easy and quick installation with a coarse UNC 1/4"-20 thread and Class 2A fit, ensuring smooth engagement and consistent performance
- Secure and stable fastening provided by the integrated collar (1/2" diameter, 3/8" height) that helps prevent over-tightening
- Wide regulatory compliance meeting RoHS 3 and REACH standards for safe use in global markets
- Versatile right-hand threading suitable for standard assembly and disassembly in various machinery and equipment
Professional Applications & Engineering Value
This 1/4"-20 knurled thumb screw is engineered to solve common industrial challenges such as frequent adjustments and tool-free access needs. The 18-8 Stainless Steel material offers superior corrosion resistance, making it ideal for applications in electronics, machinery panels, and outdoor equipment where exposure to moisture or chemicals is a concern. The fully threaded UNC coarse spacing and Class 2A fit ensure quick, reliable fastening with minimal cross-threading risk, while the knurled head with a raised profile provides a non-slip surface for high-torque manual operation. This design is particularly valuable in maintenance-heavy environments, reducing downtime and enhancing operational efficiency without compromising on tensile strength or compliance with industry regulations.
Specification Summary & Compliance
This thumb screw adheres to precise dimensional standards, including UNC thread with Class 2A fit for consistent threading accuracy. It is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B83 and tensile strength of 80,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety requirements for industrial use worldwide.
