Truss Head Self Drilling Screw

Specialized fastener for steel sheets, aluminum panels, wood and composite materials. Low‑profile truss wafer head with integrated drill tip, ideal for light‑steel structures, ceilings, metal enclosures, interior decoration and outdoor fastening.

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

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

Head: Truss/Wafer head (Phillips drive)

Thread: Standard / fine thread with drill flutes

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

Key Advantages

Large wafer head evenly spreads pressure, prevents panel sinking & damage

Integrated drill tip, no pre‑drilling; hardened tip penetrates metal reliably

Precision threads deliver strong clamping and stable fastening

Multiple finishes ensure corrosion resistance for indoor & outdoor applications

Installation Instructions

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Mark screw positions on the mounting surface.
No pre-drilling required for metal, wood and composite panels.
Drive vertically at steady speed with consistent light pressure.
Drive until truss head sits flush – do not over-tighten to avoid sheet deformation.
Clear debris and check fastening firmness.

Specification Standards

Item No.	Thread Size	P	Dk	K	L1	Nr.Phillips(H)

TDS- 19001	ST2.9	1.1	8.8	2	4.5	1
TDS- 19002	ST3.5	1.3	9.5	3	5	2
TDS- 19003	ST3.9	1.3	10.1	3	6	2
TDS- 19004	ST4.2	1.4	10.7	3	7	2
TDS- 19005	ST4.8	1.6	11.2	4	8	2
TDS- 19006	ST5.5	1.8	11.7	4	9	3

Application

Suitable for steel sheets, aluminum panels, wood and composite boards. Ideal for light‑steel framing, ceilings, metal enclosures and outdoor fastening.

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