The BOSTITCH PT-MC14825G.5M 2-1/2 Inch x .148 Galvanized Paper Tape Collated Metal Connector Nails have a smooth finish and are galvanized, suitable for use in most exterior applications. Common applications are hurricane straps & clips, rafter ties and joist hangers. For use in the 30-34 degree paper tape metal connector nailers such as the Bostitch MCN150, MCN250, MCN250S & F33PT (equipped with metal connector nosepiece). 500 nails per box. When using stainless steel hardware, or in corrosive environments such as coastal construction, stainless steel nails may be recommended.