Bostitch hcfn series high carbon galvanised nails 15 gauge packs of 15003000 bostitch hcfn 30 this pack of 1500 high carbon galvanised nails 30mm from bostitch have been designed for the bostitch concrete block nailer manufactured with high carbon zinc dichromate hcfn finish bostitch hcfn 30 hcfn series high carbon galv nails 15 gauge 30mm pack of 1500