7d (2-1/4") Simpson Wood Siding Nail - 316 Stainless Steel, Pkg 35 RCA223/54-R150 It has smooth driving with

It has smooth driving with less torque and superior holding power due to the patented reverse thread design

The minimum effective shank length must equal or exceed the sum of the thickness of the attached material and the minimum embedment depth

and roof framing

Zinc Nailon anchors are low-cost

Use a hex socket driver to ensure full engagement and prevent cam-outs

7d (2-1/4") Simpson Wood Siding Nail - 316 Stainless Steel, Pkg 35 RCA223/54-R150 It has smooth driving withSimpson wood siding nails are available in either type 304 or type 316 stainless steel. The checker pattern on the nail head blends well with wood grain, reduces glare from sunlight and accepts surface finishes. Annular ring shank increases pull out resistance to provide a secure attachment that reduces cupping of siding boards.