M1.6 x 20mm Torx Countersunk Screws (ISO 14581) - A4 Stainless Steel Torx Countersunk Machine Screws feature an internal torx socket drive and a flat head. The torx drive allows for a more even distribution of force whilst tightening and reduces the chances of cam-out whilst the flat head allows for the screw to lay flush with the base material. Machine Screws are massively versatile as they are available in a wide variety of head styles and drive types. These Torx Countersunk Machine Screws are made from A4 Marine Grade Stainless Steel which provides corrosion and oxidation resistance as well as increased resistance in harsh chemical and outdoor environments. For larger quantities or custom sizes, please email and one of our team will provide you with a quotation. M1.6 x 20mm Torx Countersunk Screws (ISO 14581) - A4 Stainless Steel