TIMCO Twin-Threaded Countersunk Silver Woodscrews - 8 x 1/2 (Box of 200)

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.
Made from C10-18 steel to ensure consistent quality.
60° 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.
25° sharp point and single lead for a fast start and improved thread acceptance.

TECHNICAL DATA:
Thread Dia. mm: 4
Length mm: 12
Thread Length mm: 7
Size mm: 4.0 x 12
Pack Quantity Unit: Pieces
Recess Type: Pozi
Head Dia. mm: 8.06
Substrates: Softwood
Gauge: 8
Salt Spray Resistance BS EN 9227 Hrs: 72
Corrosion Rating: 1 - Clean, dry; low humidity environments
Driver Bit Size: PZ2
Thread Type: 60° Twin Threads
Point Type: 25° Sharp