YAMAHIRO VISCON SARA FV420FS 4x20 FV420FS 1 box

Catalog number: FV420FS Features: ● Screws for concrete that do not require plugs. ● Highly rust-resistant and reliable fluorine silver finish (zinc plating + special chromate + fluorine, aluminum resin paint baked coating). ● Packed in a PP bag that is convenient for display and storage. Applications: ● When fastening metal fittings, piping, boards, wood, etc. to concrete-based substrates (concrete, blocks, bricks, hard mortar, etc.). Specifications: ● Nominal diameter d (mm): 4 ● Pilot hole diameter (mm): 3.4-3.5 ● Drilling depth (mm): 30-t ● Length (mm): 20 ● Head diameter D (mm): 7.0 ● Head height H (mm): 2.2 ● Screw diameter d (mm): 4.2 ● Pitch p: 1.5 ● Flat head ● Full thread Material/Finish: ● Iron (aluminum killed steel 1018A) ● Surface treatment: Trivalent silver Caution: ● Be sure to drill the pilot hole diameter with the specified drill diameter. ●The pilot hole depth should be at least the screw-in depth + 10 mm. ●To remove powder, move the drill in and out several times while drilling the hole to completely remove it. ●When tightening, tighten slowly at a low speed and do not overtighten at the end. The maximum torque of the impact driver is more than 30 times the breaking torque of a φ4 screw connector.