S-92421A542 1/4"-20 x 1" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual grip with knurled head texture for secure handling without tools, even in oily conditions
• Durable brass construction offers excellent corrosion resistance for long service life in demanding environments
• Flared collar design provides increased bearing surface to prevent over-tightening and material damage
• Precise UNC Class 2A thread fit ensures smooth engagement and reliable fastening in coarse thread applications
• Full 1-inch threading allows maximum adjustability and secure holding across the entire fastener length
• Right-hand thread direction follows standard convention for intuitive installation and removal
• Environmental compliance with RoHS 3 and REACH regulations for safe use in electronic and industrial settings

Professional Applications & Engineering Value

This brass thumb screw delivers exceptional value in applications requiring frequent manual adjustments. The knurled round head with flared collar design solves the common problem of slipping during hand-tightening, while the coarse UNC 1/4"-20 threading provides quick engagement and disengagement. The fully threaded construction ensures consistent clamping force across the entire 1-inch length, making it ideal for electronic enclosures, instrument panels, and machinery access panels where tool-free operation is essential. The Class 2A thread fit guarantees reliable performance in industrial assemblies requiring repeated adjustments without thread wear issues.

Specification Summary & Compliance

This thumb screw features 1/4"-20 UNC coarse threads with Class 2A tolerance for consistent fit and performance. The fastener is fully threaded along its 1-inch length with right-hand thread direction. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in electronic and industrial applications where chemical restrictions apply.