Self Drilling Countersunk Wing Screw With A Ribbed Head, Phillips Drive

High-performance fastener for steel sheets, aluminum panels, wood and composite materials.

Features ribbed countersunk head, winged design and integrated drill tip, widely used for light steel keel fixing, interior decoration and building fastening.

Material: Carbon steel (1022), SUS410, SUS304 stainless steel

Specs: Dia. 3.5‑6.3 mm; Length 13‑100 mm

Surface Finish: Black phosphate, bright zinc, blue‑white & yellow zinc; custom anti‑rust / salt‑spray available

Key Advantages
Wing structure removes wood fibers for smooth drilling and tapping
Hardened drill tip requires no pre-drilling for high working efficiency
Precision threads provide strong clamping force and stable fastening
Multiple finishes deliver excellent corrosion resistance for indoor and outdoor use

Installation Instructions

Step 1: Place the screw vertically on the surface, fasten with a matched Phillips bit.

Step 2: Drill directly without pre-drilling, wings remove wood fibers for smooth threading.

Step 3: Continue tightening until the ribbed countersunk head is fully flush with the surface.

Step 4: Check for firm, flat and anti-loose fastening effect.

Installation Notes

1. Operate vertically to avoid screw deflection and surface damage.

2. Avoid over-tightening to prevent material crack and excessive sinking.

3. Use matched bits to prevent screw head slipping and damge.

Specification Standards

Item No.	Diameter	Head Diameter	Head Height	length
		max
HWS- 22001	M4.2	8.2	2.7	1“; 1-1/4 ; 1-3/4
HWS- 22002	M4.8	9.8	3.2	1“; 1-1/4 ; 1-1/2; 1-3/4 ; 2″
HWS- 22003	M5.5	11.0	3.5	1-1/2; 1-3/4 ; 2″
HWS- 22004	M6.3	12.4	4.0	1-3/4 ; 2″

Application

Suitable for steel sheets, aluminum panels, wood and composite boards. Ideal for light steel structure connection, interior decoration, keel fixing, furniture assembly and flush surface fastening.

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