Catalogue number: BN438B Features: ● Concrete screws that can be used to attach pipe and wiring bands and metal fittings. ● High and low screws, compatible with the re-attachable padding method. (Pads are used when the screw spins freely, so the number of pads is not included for the number of screws.) Specifications: ● Nominal diameter d (mm): 4 ● Length (mm): 38 ● Threaded part (mm): 37 ● Head diameter (mm): 7.3 ● Color: Silver ● Head shape: Pan head ● Pilot hole diameter (φmm): 3.4-3.5 ● Packed Material/Finish: ● Iron
