Lag Screw ("Glukhar")

The self-tapping hex head wood screw also has other names: “Glukhar” lag screw, plumbing screw-bolt.

The fastener is a pointed steel rod with a coarse external thread with a diameter from 6 to 24 mm. The screw length (L) ranges from 20 to 500 mm, and the threaded portion is at least 0.6 L.

The screw is made of carbon steel C1022 with property class 4.8, A2 or A4 stainless steel, or brass. Products made of plain steel are electrogalvanized or hot-dip galvanized for corrosion protection.

Application, installation

“Glukhar” lag screws are used for joining timber beams, joists, battens, and sleepers when building roof truss systems and subfloors. Combined with expansion wall plugs, hex head screws are used for mounting equipment onto heavy and porous concrete, brick, and plasterboard substrates.

Installation starts with pre-drilling a hole. The screw is then driven directly into the wood surface with a wrench or power driver, while for concrete, brick, or plasterboard the fastener is installed after a polymer wall plug has been driven in.

FLOK supplies “Glukhar” lag screws from various manufacturers. Payment and delivery are available in any method convenient for the buyer.