S-92421A540 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
- Effortless hand-tightening with a knurled round head for superior grip, eliminating the need for tools in quick assembly or adjustments.
- Excellent corrosion resistance due to the brass material, ensuring long-term reliability in various environments.
- Quick and secure fastening provided by the UNC coarse thread and fully threaded design, reducing installation time.
- Stable seating and alignment from the flared collar, which helps distribute load and prevent loosening under vibration.
- Broad compatibility with Class 2A thread fit, ensuring reliable engagement with standard UNC threaded components.
- Compliance with environmental regulations including RoHS 3 and REACH, making it suitable for global markets and sensitive applications.
- Durable and reusable construction from brass, offering good machinability and resistance to galling.
Professional Applications & Engineering Value
This 1/4"-20 brass thumb screw is engineered to address the need for rapid, tool-free fastening in industrial and electronic assemblies. The knurled head provides a non-slip surface, ideal for frequent adjustments in control panels, access covers, and machinery guards. Made from brass, it resists corrosion and is non-magnetic, making it perfect for electrical enclosures and marine applications. The UNC coarse threading and fully threaded design ensure quick starts and strong holding power, while the flared collar adds stability, preventing damage to soft materials and maintaining alignment. Its RoHS and REACH compliance ensures it meets strict environmental standards, offering peace of mind for OEMs and maintenance teams in sectors like telecommunications, automotive, and consumer electronics.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A thread fit for consistent, reliable performance. Key dimensions include a 1/4"-20 thread size, 3/4" length, and a knurled round head with a flared collar. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in environmentally conscious industries.
