For dimensional shingles being installed over a layer of existing dimensional shingles you should always use a 1 1 2 inch roofing nail.
Galvanized roofing nail sizes.
Get the grip rite 11 x 1 2 in.
Pack 12egrfg1 fasteners used to shingle roofs from the home depot.
Electro galvanized steel roofing nails 1 lb.
These grip rite roofing nails are for installing asphalt these grip rite roofing nails are for installing asphalt roofing shingles.
They can also be used to apply insulation board and felt to wood substrates.
Galvanized roofing nails are steel nails that are zinc coated.
For pricing and availability.
Metabo hpt was hitachi power tools 1 1 2 in 15 degree pneumatic roofing nails 7200 count item 688875.
The length of the nail will depend on the roofing material you choose.
Metabo hpt was hitachi power tools 1 1 4 in 15 gauge electro galvanized steel pneumatic roofing nails 7200 count item 688873.
They are electro galvanized to help resist rust and corrosion.
If your decking is less than 3 4 inch then a 1 1 2 inch nail will suffice.
Another kind of classification for roofing nails is by size.