Sealey Hex Head Zinc Plated Din 7504K Self Drilling Screws 4.2mm 25mm Pack of 100

This 4.2mm diameter by 25mm length variant provides extended reach whilst maintaining the smaller diameter, making it ideal for applications requiring fastening through thicker materials or multiple layers. The 25mm length is particularly effective for fixing insulated panels, thicker gauge sheet metal, and situations where enhanced thread engagement is required for maximum holding strength. The combination of 4.2mm diameter and 25mm length offers excellent versatility across construction, fabrication, and maintenance applications. The self-drilling point efficiently penetrates materials without wandering, whilst the zinc-plated finish ensures reliable performance in demanding environments. The hex head design provides positive engagement for both manual and powered installation. Features and Benefits: • 4.2mm diameter x 25mm length perfect for thicker materials and multiple layers • Extended length provides superior thread engagement and holding power • Self-drilling point cuts throug