Simpson 3d - 1-1/4" Wood Siding Nail, 304 Stainless Steel Belt Sanders / Grinders and the 24 TPI pitch

and the 24 TPI pitch is optimized for threading into metal substrates

Head Type: Casing Head (Countersunk)

Concrete-to-column connections using threaded rod and epoxy

so you can get to work immediately with common masonry drill bits already on hand

Simpson 3d - 1-1/4" Wood Siding Nail, 304 Stainless Steel Belt Sanders / Grinders and the 24 TPI pitchSimpson 3d Wood Siding Nail in 1 1 4" Length, 304 Stainless Steel by Simpson Strong Tie is engineered specifically for fastening wood siding panels with reliable holding power and long term corrosion resistance. Featuring an annular ring shank for superior withdrawal resistance and a checker patterned full round head that blends naturally with wood grain, this nail delivers a secure, low profile attachment that helps maintain the structural integrity