Gauge/Diameter (mm) 3.1 Length 90 21° Collation Angle Profile RING Finish G50 Description RH STICK 3.10-90 RING GAL-HD50 2M Qty per box 2000 Will Fit F21PL-E, N79RH-2 Packs of 2000 Round head nails. These plastic collated stick nails traditionally have a full round head, while only giving marginally better holding power to clipped head nails, they are preferred by the construction industry. Collation is angled at 21° to accommodate the overlapping heads. Ring shank nails have a series of rings punched into the surface of the shank. Again a difference in the diameter of the shank is produced making it even more difficult to withdraw the nail. Ring shank nails have to be produced at lower speeds and their cost is generally higher than for a smooth shank nail. The air consumption per nail is also higher, and the energy required to drive these nails into hard wood is very much greater. Galvanising , or coating with Zinc, is the best way to prevent nails from corroding. The zinc does not