S-98704A920 5/16"-24 x 1 1/8" Thumb Screws

Key Features & Benefits at a Glance

• Enhanced grip and tool-free operation with a knurled acetal plastic head for secure manual tightening and loosening in tight spaces.
• Superior corrosion resistance from 18-8 Stainless Steel construction, ensuring long-term reliability in various industrial environments.
• Precise and secure fastening with a Class 3A thread fit and 5/16"-24 UNF fine thread, minimizing the risk of cross-threading and vibration loosening.
• Durable black finish provides added aesthetic appeal and an extra layer of protection against wear and environmental factors.
• Low-profile round head design offers a sleek profile, making it ideal for applications where clearance is limited.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global markets.
• Versatile temperature tolerance with a head temperature range of 32° to 180° F, suitable for various operational conditions.

Professional Applications & Engineering Value

This 5/16"-24 UNF thumb screw is engineered to address common challenges in assembly and maintenance, where quick access and reliable fastening are critical. The 18-8 Stainless Steel body provides excellent strength and corrosion resistance, ideal for harsh environments in electronics, machinery, and automotive sectors. The knurled acetal plastic head ensures a firm grip, reducing slippage and enabling efficient hand-tightening without tools, which speeds up installation and reduces labor costs. With a Class 3A thread fit and fine threading, it delivers precise alignment and vibration resistance, minimizing the risk of thread damage in precision applications. The black finish and low-profile design further enhance its suitability for consumer-facing and compact assemblies, offering both functional and aesthetic benefits.

Specification Summary & Compliance

This thumb screw adheres to UNF thread standards with a size of 5/16"-24 and features a Class 3A thread fit for high precision and tight tolerances. It is fully threaded with a right-hand direction and includes a hex drive for optional tool use. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for industrial and commercial applications requiring environmental safety.