The Hobsons X9 Class 3 Bugle Batten Rib Hex Screw (#14-10 x 50mm) is a heavy-duty self-drilling fastener designed for fixing plasterboard, timber and sheet materials to light gauge steel framing. Featuring a bugle batten rib head, it provides a clean, flush finish while reducing surface damage and improving holding performance. The X9 self-drilling point enables fast, efficient installation into steel up to 3mm thick without the need for pre-drilling in most applications, while the Class 3 corrosion-resistant coating ensures dependable performance in indoor and protected outdoor environments. Designed for use with a **5mm Hex drive bit**, it is supplied in a convenient **500-piece box** and is ideal for professional trade and commercial applications.