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
Stainless Indented Hex Washer Head Self-Tapping Screw
A2 stainless indented hex washer head tapping screw, e.g. 1/4" (#14) × 3/4", slotted option, 100 % inspected.
- Material
- A2 (304) stainless
- Head
- Indented hex washer, slotted
- Size
- #8–#14 × 1/2"–2"
- Point
- Sharp, type AB
- Finish
- Plain, passivated
- Inspection
- 100 %
- 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
For aluminium, plastic and thin stainless where rust staining is not acceptable. The indented head holds a magnetic setter, and a slot allows hand finishing.
Applications
- Aluminium fabrication
- Signage
- Food equipment
Key features
- No rust staining
- Slotted for hand driving
- 100 % inspected
- Inch and metric
Specifications
Typical values. Every dimension, hardness and coating is confirmed in writing with your quotation.
| Material | A2 (304) stainless |
|---|---|
| Head | Indented hex washer, slotted |
| Size | #8–#14 × 1/2"–2" |
| Point | Sharp, type AB |
| Finish | Plain, passivated |
| Inspection | 100 % |
| Certificate | ISO 9001 |
| MOQ | 500 kg |
| 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 Stainless Indented Hex Washer 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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