Special Features:

Item is a self-tapping, removable, concrete anchor with a specially designed two lead thread, two threads of unequal size, larger diameter thread is notched at intervals along its length to facilitate tapping into masonry materials; a specially-sized carbide-tipped drill bit is suplied with each box of anchors for hole preparation; installation hole shouldbe drilled to not less than one-quarter inch deeper than the anchor penetration into the masonry; the finish has a proprietary synthetic polymer coating; the end item identification is the next generation radar (nexrad), which is used by the national weather service (nws)

Properties:

A hardened externally threaded fastener whose thread extends to the bearing surface of the head. The thread may be fluted or otherwise designed to cut or form its own mating thread. Excludes screw, assembled washer.