Catalog number: FRT-051 Features: ●Used when building joists or decks with 2x4 lumber. Uses: ●For wood Specifications: ●Color: Black ●Board thickness (mm): 2 ●Hole diameter (mm): 3.8-4.1 Material/Finish: ●Iron/Black paint Note: ●2x4 lumber has a set standard, but the thickness varies by a few millimeters depending on the drying conditions and the lumber factory. ●Because wood is a natural material, it may warp or twist, making it impossible to fasten metal fittings in the correct position.
