S-98704A620 1/4"-20 x 3/4" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced manual operation with knurled acetal plastic head for secure grip without tools in tight spaces
• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or demanding environments
• Quick installation and removal with coarse UNC Class 3A threads ensuring fast, precise engagement
• Dual drive flexibility through knurled thumb head and 3/16" hex drive for versatile tool access
• Reliable temperature performance with head operating range of 32° to 180°F for stable use in varying conditions
• Full thread engagement along the 3/4" length for maximum holding power in assemblies
• Environmentally compliant design meeting RoHS 3 and REACH standards for safe, sustainable applications

Professional Applications & Engineering Value

This 1/4-20 thumb screw combines 18-8 stainless steel durability with a knurled acetal plastic head to address common assembly challenges in industrial settings. The coarse UNC thread and Class 3A fit provide rapid, secure fastening in equipment panels, electronic enclosures, and machinery guards where frequent adjustments are needed. The black finish offers a professional appearance while the hex drive compatibility ensures backup tool use when high torque is required. Its low-profile round head minimizes snagging in confined spaces, making it ideal for prototyping, maintenance, and OEM applications requiring reliable, hand-operable fasteners.

Specification Summary & Compliance

This thumb screw features precision 1/4"-20 UNC coarse threads with Class 3A fit for superior thread engagement and tolerance. The fully threaded 3/4" length ensures consistent performance, manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The right-hand thread direction and low-profile round head design adhere to industry-standard specifications for thumb-operated fasteners.