S-91830A582 1/4"-20 x 1 1/4" 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
- Superior hand-tightening grip with a 1" diameter knurled round head for secure, tool-free operation in tight spaces
- Excellent corrosion resistance provided by 18-8 Stainless Steel, ensuring long-term reliability in harsh industrial environments
- High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for demanding applications
- Easy and quick installation due to coarse 1/4"-20 UNC threads and Class 2A fit, providing reliable engagement
- Full-threaded design for maximum holding power along the entire 1 1/4" length
- Raised head profile offers enhanced clearance and a comfortable, ergonomic surface for repeated use
- Compliance with environmental and safety standards including RoHS 3 and REACH, ensuring safe use in regulated industries
Professional Applications & Engineering Value
This 18-8 Stainless Steel Thumb Screw is engineered to solve common assembly challenges where tools are impractical or frequent adjustments are needed. The knurled head provides a non-slip surface, enabling secure hand-tightening in applications like industrial machinery panels, electronic enclosures, and prototyping fixtures. Its UNC coarse threading and Class 2A fit ensure quick, reliable fastening with reduced cross-threading risk, while the fully threaded shank offers consistent clamping force. Made from corrosion-resistant 18-8 stainless steel, it withstands exposure to moisture, chemicals, and outdoor conditions, making it ideal for maintenance, OEM equipment, and laboratory devices requiring durable, reusable fasteners.
Specification Summary & Compliance
This thumb screw features a 1/4"-20 UNC coarse thread with Class 2A dimensional accuracy for consistent fit. It is manufactured from 18-8 Stainless Steel with a tensile strength of 80,000 psi and hardness of Rockwell B83. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.
