#8 X 3" self-drilling zinc coated fastener assembled COIN Plate for Insulation Board Panels •Insulation Thicknesses: 2" to 2-1/2". *(Does NOT take into account the thickness of sheathing. You may have to move up a fastener size to accommodate Insulation Board and Sheathing thickness into Steel Studs). •Used for: The mechanical attachment of Expanded Polystyrene (EPS) Insulation Board in conjunction with Exterior Insulation and Finish Systems to Steel Studs 14 gauge to 20 gauge. 1000 pcs per box.