4.0 Optimaxx Extreme Performance Wood Screws 200PC Box (4.0x40mm, Zinc Plate & Yellow Passivated, Pozi Screws)

General description OPTIMAXX C288-420 4.0X40 FULL THREAD screws feature a unique design that allows for self-countersinking into various materials without the need for counterboring, ensuring no surface damage. The screws are engineered with a double reinforced collar that enhances strength and prevents snapping, while also allowing for a deeper pozi recess. Technical specifications Dimensions: 4.0 x 40 mm Thread type: Full thread Unique lubricant coating for smooth insertion Razor sharp point angle: 20 degrees Usage These screws are ideal for fast penetration into timber, even without a pilot hole, thanks to their sharp saw tooth formation and specifically positioned long thin groove that minimizes pressure build-up and prevents wood splitting when screwing near edges.