Modified Truss Head Phillips Self-Drilling Screw Colour Coated
Colour-coated modified truss head drill-point screw for visible fixings on metal.
A modified truss head is wider and flatter than a pan head, which gives a large bearing surface on thin or soft material without the height of a washer head. Put a drill point under it and you get a screw that makes its own hole in light steel and then spreads its clamping load across a wide footprint.
The old site shows this item colour coated. That matters where the fixing sits on a finished surface and has to match it: a coloured head disappears against matching cladding or trim, whereas a bright zinc head announces itself from across the building.
Why buyers choose it
- Wide flat bearing face spreads load on thin sheet and soft board
- Drill point removes the pre-drilling pass on light steel
- Colour coating for fixings that stay visible on a finished face
- Shank M3.5 to M6.3 and lengths 13 to 100 mm
Send the total steel thickness the point has to pass through, the head style and the exposure and the size will be confirmed against the closest standard before quoting. Samples of this item are free of charge.
Specification
| Shank Diameter | M3.5/M3.9/M4.2/M4.8/M5.5/M6.3 |
|---|---|
| Length | 13mm-100mm |
| Material | C1022, 1022A |
| Head Type | Truss head |
| Drive Type | Phillips |
| Finish | yellow/white/blue zinc plated, phosphated |
| Packing | 1. Bulk packing 25 kg in a carton or bag; 2. 1 kg in a box/bag, 25 boxes/bags in a carton, then pallet; 3. Count packs: 1000pcs/500pcs/250pcs per small box, then small boxes into cartons |
| Minimum Order | 500 kg |
| Payment | T/T, L/C |
Specification as published by Haiyan Ehons Industrial Co., Ltd.. Drill capacity is set by the point supplied; state the total steel thickness on the enquiry.
Technical detail
| Material | C1022 and 1022A carbon steel. |
|---|---|
| Shank diameter | M3.5, M3.9, M4.2, M4.8, M5.5 and M6.3. |
| Length | 13 mm to 100 mm. |
| Head and drive | Modified truss head with a Phillips drive. |
| Finish | Yellow, white or blue zinc plated, and phosphated; colour coating available. |
Problems this screw solves
Bright fixings spoil a finished face
A coloured head on a coloured panel reads as part of the panel. That is the whole point of specifying it.
Pan heads sink into thin sheet
A modified truss head has a larger footprint, so it bears rather than pulls through.
Pre-drilling costs a pass
The drill point cuts its own hole in light steel, which removes a drilling operation and a dropped drill bit.
Where it is used
- Fixing trims and flashings where the head colour has to match the panel
- Light steel framing connections behind a finished surface
- Metal-to-metal fixings on thin gauge assemblies
- Signage and panel mounting onto steel sub-frames
Who buys it
Cladding and trim installers, sign makers and light steel fabricators who need the fixing to be invisible against the finished colour.
Quality control priorities
Colour-coated parts are inspected for coverage on the head crown and for coating build-up in the recess, since excess coating changes bit fit. Drill point geometry and case hardness are checked on samples from each heading and heat treatment batch.
Customisation
Colour is specified with the order and the coating sits over the base protective system, so the exposure has to be stated alongside the colour. Send a panel or a colour reference with the enquiry rather than a colour name.
How it compares
Against the zinc plated truss head drill-point screw
Same head, same shank range and same drill point; this one carries a colour coating for visible work.
Against the truss head self-tapping screw
That one has a sharp point and needs a prepared hole or a very thin substrate. This one drills its own.
Against a hex washer head roofing screw
The roofing screw seals with a bonded EPDM washer. Use it where the fixing penetrates a weather surface; use this one where it does not.
Installation notes
Let the point drill before the thread bites
Apply steady pressure and let the drill point finish the hole. Forcing the thread in early strips it.
Do not over-drive a coated head
Seat the head and stop. Continued driving scars the colour coating and exposes the base metal.
Check the drill capacity
Drill-point screws have a maximum total steel thickness. State the thickness when ordering so the point is matched.
Store coated screws dry
Applied colour coatings are durable but not improved by sitting in a wet carton on site.
Frequently asked questions
What colours can you supply?
What shank diameters are available?
What lengths?
What material are they made from?
How are they packed?
What are the payment terms?
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Packed 1. Bulk packing 25 kg in a carton or bag; 2. 1 kg in a box/bag, 25 boxes/bags in a carton, then pallet; 3. Count packs: 1000pcs/500pcs/250pcs per small box, then small boxes into cartons. Minimum order 500 kg for this item.