4" Simpson T20ABNB 8 Gauge Annular Ring Shank Box Nail - 316 Stainless Steel, Pkg 25 LbThe Simpson T20ABNB is a heavy duty 8 gauge box nail with a 4" length and an annular ring shank for exceptional holding power. Made from 316 stainless steel, this nail is built to withstand the harshest environments including coastal, marine, and chemically treated wood applications. The ring shank design delivers superior withdrawal resistance, making this nail ideal for structural framing, decking, fencing, and other critical exterior wood to wood