Simpson Strong-Tie S13A175SNC 15° Wire Coil Nails - 1-3/4 Inch Full Round Head Ring-Shank Siding Nails (3600 Count) - Type 304 Stainless Steel - Perfect for Exterior Siding, Roofing & Wood Construction Projects

These are being used with a Harbor Freight siding nail gun I’ve had now for several years. I had previously used Swan SS nails of the same dimensions with no issues. These Simpson nails have the same part number as the Swan SS nails did so it appears they are now one and the same possibly? Simpson maybe owns Swan now? The Simpson nails do have a little more die flashing marks under the nail head and the nail point is not to the same sharpness/point as the Swan nails were. The Swan nails were made in Korea and the Simpson nails say made in the US. Other than that for fencing and siding use I see no issues. I fired about a dozen nails into a 2x4 back to back with no jambs or issues or setting changes from the Swan SS nails. I just switched coils and took off working.