- Material: 304 stainless steel - Surface treatment: electroplating. Stainless Steel Black Lag Bolts ● Product: - 3/8 x 2-1/2 - Screw diameter: 3/8 Inch - Screw length: 2-1/2''. - Before installing the lag screw, it is best to drill a guide hole beforehand. Everbilt 3/8 in. x 2-1/2 in. External Hex Hex-Head Lag Screws (25-Pack... Material: 304 stainless steel ; Surface treatment: electroplating , colour: black. 3.Size : 3/8" x 2-1/2", screw diameter - Widely used in home and industrial applications such as deck building or joining wood,pergolas, etc., 1., 3/8 x 2-1/2 lag screw., 2., Material: 304 stainless steel ; Surface treatment: electroplating , colour: black., 3., Size : 3/8 x 2-1/2, screw diameter: 3/8'', screw length: 2-1/2''., 4., Contains: 8 pieces., 5., Use: widely used in industrial machine, deck or joining wood etc. Wholesale Price 3/8 X 3-1/2 Hex Penta Head Lag Bolt Screws - Wood Screw LAG 3/8 X 3 ZINC PKG LAG BOLT 3/8 X 3 HEX HEAD SCREW ZINC PLATED [50