S-98704A715 1/4"-28 x 5/8" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual grip with knurled black acetal plastic head for secure tool-free operation in tight spaces
• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or demanding industrial environments
• Precise thread engagement with Class 3A UNF fine threads ensuring reliable, vibration-resistant fastening
• Low-profile round head design minimizes protrusion while providing ample surface for comfortable hand-tightening
• Versatile temperature tolerance with acetal head operating from 32° to 180°F for diverse application settings
• Full 5/8" threading delivers maximum grip length for secure attachments in various material thicknesses
• Regulatory compliance with RoHS 3 and REACH standards ensures environmental safety and global market acceptance

Professional Applications & Engineering Value

Engineered for industrial applications requiring frequent adjustments, this 1/4"-28 UNF thumb screw combines the corrosion resistance of 18-8 stainless steel with the ergonomic advantages of a knurled acetal plastic head. The fine thread spacing and Class 3A thread fit provide exceptional clamping force retention in vibration-prone equipment, while the low-profile round head design prevents snagging in confined spaces. Ideal for electronic enclosures, machinery panels, and instrumentation where tool-free maintenance and reliable fastening are critical, this component eliminates the need for separate tools while maintaining consistent performance across temperature variations.

Specification Summary & Compliance

This thumb screw features precision 1/4"-28 UNF threads with Class 3A thread fit for superior dimensional accuracy. Manufactured with fully threaded 5/8" length and right-hand thread direction, it meets industry standards for fine-thread fasteners. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and unrestricted use in regulated markets.