8g-18 x 20mm - 1000pc Countersunk Coarse Self Drilling Ribbed Head Screws Zinc Yellow

Zinc Coarse Self Drilling Screws have a hardened self drilling point which cuts through mild steel without the need for pre-drilling. However for thick or hardened steel pre-drilling may be required. The head with self embedding nibs help penetrate when countersinking. The zinc yellow coating is suitable for most indoor applications.