S-95488A307 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
- Enhanced grip and tool-free operation with a 1/2" diameter knurled brass head for secure hand-tightening in tight spaces
- Superior corrosion resistance and durability thanks to high-quality brass construction with Rockwell B78 hardness
- Reliable fastening performance with 50,000 psi tensile strength, ensuring secure connections under stress
- Easy installation and compatibility with 1/4-20 UNC coarse threads and Class 2A fit for quick assembly with standard components
- Low-profile, round head design minimizes protrusion while providing comfortable manual handling
- Full threading along the 3/4" length offers consistent engagement and adjustable positioning
- Environmentally responsible compliance with RoHS 3 standards, meeting regulatory requirements for lead exemption in copper alloys
Professional Applications & Engineering Value
This 1/4-20 UNC brass thumb screw is engineered to address common industrial challenges such as frequent adjustments and tool accessibility limitations. The knurled head provides exceptional grip, enabling quick, tool-free tightening in electronics, machinery, and prototypes where space is constrained. Made from robust brass, it resists corrosion and maintains integrity in humid or demanding environments, while the coarse UNC threading and Class 2A fit ensure reliable engagement with minimal cross-threading risks. Ideal for applications requiring repeated manual fastening, this screw combines low-profile design with high tensile strength to support maintenance-heavy and precision assembly tasks efficiently.
Specification Summary & Compliance
This thumb screw adheres to precise dimensional standards, including a 1/4"-20 UNC thread with Class 2A fit for consistent accuracy and coarse spacing to facilitate easy installation. It is manufactured to meet RoHS 3 (2015/863/EU) compliance under exemption 6(c) for lead in copper alloys, ensuring environmental safety. The specifications cover a 3/4" length with full threading, 50,000 psi tensile strength, and Rockwell B78 hardness, supporting reliable performance in various industrial settings.
