Wing nuts din 315 (ansi b 18.17)-- a t-nut, t nut, or tee nut (also known as a blind nut,[1] which can however also refer to a rivet nut or an insert nut) is a type of nut used to fasten a wood, particle or composite materials workpiece, leaving a flush surface. it has a long, thin body and a flange at one end, resembling a t in profile. The flanges of t-nuts often have hooks or serrations on the prongs that dig into a wooden work piece as the bolt is tightened from the opposite side of the piece, providing better retention. in 1969, the first four-prong t-nut with the eight-sided base was patented. Unlike the standard round base t-nuts, the eight-sided t-nuts can be fed efficiently and reliably via machine. The eight-sided t-nut base has become the standard configuration for t-nuts inserted by machine.

Wing nuts din 315 (ansi b 18.17)-- a t-nut, t nut, or tee nut (also known as a blind nut,[1] which can however also refer to a rivet nut or an insert nut) is a type of nut used to fasten a wood, particle or composite materials workpiece, leaving a flush surface. it has a long, thin body and a flange at one end, resembling a t in profile. The flanges of t-nuts often have hooks or serrations on the prongs that dig into a wooden work piece as the bolt is tightened from the opposite side of the piece, providing better retention. in 1969, the first four-prong t-nut with the eight-sided base was patented. Unlike the standard round base t-nuts, the eight-sided t-nuts can be fed efficiently and reliably via machine. The eight-sided t-nut base has become the standard configuration for t-nuts inserted by machine.