The 075 Series Piano Hinge, in 0.075" thick Steel, is a heavy duty hinge that's ideal for heavier doors, lids, toolboxes and access panels. These are plain steel, with no holes, and have a factory "mill" finish.
Available in open widths from 2" up to 3 1/2" and lengths of 72" or 96".
No plating or other coatings, though they do have a light oil residue to prevent them from rusting during shipping.