Modified Truss Head Phillips Self-Tapping Screw
Sharp-point modified truss head screw with a wide bearing face for soft substrates.
The modified truss head is the widest low-profile head in this catalogue. Its value is bearing area: on soft board, on thin sheet, on anything where a smaller head would pull through, the wide flat crown spreads the clamping load and the fixing holds.
With a sharp point rather than a drill point, this version is the one for pre-punched holes and thin material. It forms its own thread as it goes, so no tapping operation is needed and nothing has to be reached from the back of the assembly.
Why buyers choose it
- Wide flat head resists pull-through in soft board and thin sheet
- Sharp point taps its own thread without a drilling pass
- Shank M3.5 to M6.3 and lengths 13 to 100 mm
- Zinc plated in yellow, white or blue, or phosphated
Send the hole size already in the part, the substrate thickness and the head style 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.. Sizes are confirmed against the closest standard before quoting, standard or not.
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. |
Problems this screw solves
Small heads pull through thin material
Bearing area is the whole answer. The truss crown is wide enough to hold without an added washer.
Washers add a second component
The head geometry does the washer's job, which removes a part from the bill of materials and a step from assembly.
Drill points are unnecessary on pre-punched work
Where the hole is already there, a sharp point seats faster and costs less.
Where it is used
- Fixing soft board and insulation carrier sheets to light framing
- Sheet-to-sheet fixing through pre-punched holes
- Attaching brackets where a small head would pull through
- General light assembly where the head has to bear rather than sink
Who buys it
Light steel and board contractors, sheet metal assemblers and OEM builders who need a wide bearing head without the height of a washer.
Quality control priorities
Head diameter and underhead flatness are gauged on this part, because the bearing area is the entire reason for choosing it. A dished or undersized crown loses the pull-through resistance the specifier bought. Thread form is checked on samples through each run.
Customisation
Head diameter can be specified where a particular pull-through value is needed. Where the screw fixes through a soft carrier sheet, send a sample of the sheet with the enquiry so the head size is quoted against the real material.
How it compares
Against the zinc truss head drill-point screw
Same head, drill point instead of sharp. Use that one when there is no hole and the steel is solid.
Against the colour-coated truss head screw
Same family with an applied colour finish for visible work.
Against a pan framing screw
The framing head is lower but narrower. Choose by whether head height or bearing area is the binding constraint.
Installation notes
Check the hole size
A tapping screw needs a hole matched to core diameter. Oversize and it spins; undersize and it strips the formed thread.
Seat, do not bury
The head is meant to bear on the surface. Driving it into soft board destroys the bearing area.
Use PH2 where the recess calls for it
Phillips size follows the head size; confirm against a sample.
Phosphate where the bit needs grip
Phosphated heads give a driver more friction than plated ones, which helps on a long repetitive run.
Frequently asked questions
What is a modified truss head?
Is there a drill-point version?
What shank sizes are available?
What is the material?
How is it packed?
What payment terms apply?
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View specificationQuote modified truss head phillips self-tapping screw
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.