CSK Phillips Self-Tapping Screw Description

 

A CSK (Countersunk) head Phillips self-tapping screw is a threaded fastener designed to cut its own mating thread in materials like metal, plastic, or wood, eliminating the need for pre-tapping. It features a conical (flat) countersunk head with a cross-shaped (Phillips) drive that allows the head to sit flush with the surface for a smooth finish.

Typical Dimensions (varies as per standard):

Size Chart	Diameter (D mm)	Length mm
#4	2.9mm	6.5, 9.5, 13, 16, 19
#6	3.6mm	6.5, 9.5, 13, 16, 19, 25, 32
#8	4.2mm	9.5, 13, 16, 19, 25, 32, 38, 50
#10	4.8mm	9.5, 13, 16, 19, 25, 32, 38, 50
#12	5.5mm	9.5, 13, 16, 19, 25, 32, 38, 50
#14	6.4mm	16, 19, 25, 32, 38, 50

 

Key Features:

• Self-Tapping Design – forms its own thread during insertion.

• CSK (Countersunk) Head – conical shape allows it to sink and sit flush with the material surface for a smooth finish.

• Phillips Drive – prevents slippage, allows higher torque.

• Sharp Pointed Tip – easy penetration into materials.

• Versatile Applications – widely used in woodworking, cabinetry, metal-to-plastic assemblies, and wherever a smooth, unobtrusive finish is required.