I-star, countersunk head, partially threaded with milled pockets under the head, yellow galvanized / silver chromed Suitable for universal use in hardwood, particle board, plastics and other materials, can be used without pre-drilling and without splitting the material. Outer diameter 4.0 mm Features countersunk head, six-point star profile Main color silver Length 50.0 mm Type/kind Article Design universal screws Variant connection technology