S-98704A825 5/16"-18 x 1 3/8" Thumb Screws

Key Features & Benefits at a Glance

• Tool-free manual operation with knurled black Acetal Plastic head for secure grip and quick adjustments without slipping
• Superior corrosion resistance from 18-8 Stainless Steel construction, ideal for humid or demanding industrial environments
• Precise Class 3A thread fit ensures reliable engagement and vibration resistance in critical assemblies
• Wide thermal tolerance (32° to 180°F) for stable performance across varying operational conditions
• Low-profile round head design minimizes protrusion while providing ample surface for hand-tightening
• Coarse UNC threading enables faster installation and reduced cross-threading risks in repetitive applications
• Dual compliance assurance with RoHS 3 and REACH standards for safe use in regulated industries

Professional Applications & Engineering Value

This 5/16"-18 UNC Thumb Screw combines the durability of 18-8 Stainless Steel with the ergonomic advantage of a knurled Acetal Plastic head, addressing common assembly challenges in machinery, electronics, and access panel applications. The fully threaded coarse UNC design provides consistent clamping force across the entire 1-3/8" length, while the Class 3A thread fit maintains precise alignment in high-vibration environments. The black surface finish offers both aesthetic consistency and minor wear resistance, making these thumb screws ideal for frequent adjustment points where tool access is limited or undesirable in industrial settings.

Specification Summary & Compliance

Manufactured to UNC thread standards with Class 3A thread fit for superior dimensional accuracy. The screw features a 5/16"-18 thread size, 1/4" hex drive compatibility, and fully threaded construction. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for industrial and commercial applications requiring certified components.