Self-Tapping Screws
Hex Washer Head Self-Tapping Screw
Galvanised carbon steel hex washer head tapping screw, class 4.8 and 6.8, inch and metric, ISO 7053.
ISO 7053ST3.5–ST6.3
Self-Tapping Screws
Modified Truss Head Self-Tapping Screw
K-Lath style modified truss head sharp-point screw, 10 mm head, zinc plated, for sheet metal and studs.
- Material
- Carbon steel
- Head
- Modified truss, Ø 10 mm
- Drive
- Phillips
- Diameter
- #8 (4.2 mm)
- Length
- 13–50 mm
- Point
- Sharp
- Free samplesUp to 20 pcs, ships in 7 days
- Lot test reportHardness, coating, drill time
- Made to orderCustom lengths, finishes, head marks
- Export readyFOB, CFR or CIF with full documents
Overview
A large, low head spreads clamp load on thin sheet and wire lath. The sharp point pierces 0.5–0.8 mm steel without pre-drilling.
Applications
- Metal lath
- Steel studs
- Ductwork
Key features
- Wide head for thin sheet
- Pierces light-gauge steel
- Zinc finish
- CE / ISO documentation
Specifications
Typical values. Every dimension, hardness and coating is confirmed in writing with your quotation.
| Material | Carbon steel |
|---|---|
| Head | Modified truss, Ø 10 mm |
| Drive | Phillips |
| Diameter | #8 (4.2 mm) |
| Length | 13–50 mm |
| Point | Sharp |
| Finish | Zinc |
| MOQ | 5,000 pcs |
| HS code | 7318.14 / 7318.12 (by type) |
Buying guide
Applies to all self-tapping screws.
Pilot hole
For sheet metal, drill a pilot of about 85 % of the minor thread diameter. Too small and the screw strips; too large and it will not hold.
Head style
Pan heads are general purpose; modified truss heads have a low, wide bearing face for fixing sheet to studs; hex washer heads take high torque from a nut setter.
Material
Case-hardened carbon steel taps into steel; A2 stainless taps aluminium and soft materials; SS410 combines hardness with moderate corrosion resistance.
Ordering
Packing and delivery
Standard terms for this product. Tell us if your market needs something different.
PackingSmall boxes, buckets or 20–25 kg cartons on fumigated pallets; private label available.
Lead timeSamples in 7 days; production 25–35 days after deposit.
PaymentT/T 30 % deposit, 70 % against B/L copy, or L/C at sight.
ShippingFOB Shanghai or Ningbo, CFR or CIF to your port.
Questions about this product
What is the difference between ST and M sizes?
ST sizes (ST3.5, ST4.2…) are tapping-screw threads per ISO 1478. M sizes are machine threads and need a tapped hole or nut.
Can stainless self-tapping screws tap steel?
A2 stainless is softer than hardened steel, so it works only in thin or soft sheet. Use SS410 or bi-metal screws for steel.
Do you offer head marking?
Yes, embossed or recessed head marks are available on most head styles with a one-off tooling charge.
Self-Tapping Screws
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Self-Tapping Screws
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Self-Tapping Screws
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Request for quotation
Request a quotation for Modified Truss Head Self-Tapping Screw
Tell us the screw, size and quantity. A sales engineer replies within one business day with price, lead time and a sample offer.
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