Woodscrew Countersunk Twinthread BZP No.12 3-1/2" Pack of 100
A traditional twin-thread woodscrew with single lead start for a fast installation. Mainly used in soft timber applications or masonry with a plastic plug.
Double countersunk head reduces the likelihood of head shear and assists completion of countersinking
Partially threaded from 1 - 1/4 and above
Zinc plating 3-5 microns
Made from C10-18 steel to ensure consistent quality
60 diameter twin-threads with parallel shank for faster insertion and greater pull-out resistance
Surface hardened up to 750 HV to prevent torque shearing under load and a core hardness of up to 450 HV for improved ductility