Self-Tapping Screws
Pan Head Self-Tapping Screw, DIN 7981
DIN 7981 / ISO 7049 pan head Phillips sheet metal screw, SS410 zinc plated, 2.9–6.3 × 9.5–50 mm.
DIN 79812.9–6.3 mm
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.
- Standard
- ISO 7053 / DIN 7976
- Material
- Carbon steel
- Grade
- Class 4.8 / 6.8
- Diameter
- ST3.5–ST6.3, #6–#14
- Length
- 9.5–100 mm
- Finish
- Zinc, galvanised
- 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 sharp-point tapping screw with an integrated washer face, driven by nut setter. Use it for sheet metal into pre-drilled holes and for timber.
Applications
- Sheet metal
- HVAC
- Timber framing
Key features
- Integrated washer face
- Socket drive for torque
- Inch and metric
- Bulk pricing by weight
Specifications
Typical values. Every dimension, hardness and coating is confirmed in writing with your quotation.
| Standard | ISO 7053 / DIN 7976 |
|---|---|
| Material | Carbon steel |
| Grade | Class 4.8 / 6.8 |
| Diameter | ST3.5–ST6.3, #6–#14 |
| Length | 9.5–100 mm |
| Finish | Zinc, galvanised |
| Certificate | ISO 9001 |
| MOQ | 1 ton |
| 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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Request for quotation
Request a quotation for Hex Washer Head Self-Tapping Screw
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