For example, your dealer may stock proprietary anti-corrrosion technologies matched for alkaline copper quat (ACQ) or copper azole (CA-B). These multiple-coated screws have several advantages. First, some of the coated screws come in colors that help the fastener blend with natural and pressure-treated wood tones.
Corrosion-resistant stainless steel screws, nails and bolts in grades 304 and 305 can be used for copper-treated wood in most areas, while grade 316 should be used in coastal areas. But stainless steel fasteners can cost five to 10 times more than similar galvanized fasteners.
The manufacturers of ACQ, CA, ACZA and CCA and the treated wood industry are all recommending hot-dipped galvanized nails and stainless steel nails and screws with their treated wood products. Furthermore, they specify that the fasteners meet the ASTM A-153 specification for hot-dipped galvanizing.
Simply put, ACQ-treated lumber is extremely corrosive to metal fasteners such as nails, screws, deck hangers, etc. This problem has been complicit in a number .
Metal products in contact with pressure-treated wood must be corrosion-resistant. Examples include fasteners (nails, screws and bolts), and all connecting .
Shop our selection of Deck Screws in the Lumber & Composites Department at The Home Depot.
Inside the lumberyard, you'd load up on nails, nuts, bolts, screws, and maybe joist. And when water contacts ACQ- or CA-treated wood, it lifts copper ions from .