Concrete & Masonry Screws
Blue Ceramic Hex Washer Head Concrete Screw
3/16" and 1/4" hex washer head masonry screws with blue ceramic coating and Hi-Lo thread.
3/16"Carbon steel
Concrete & Masonry Screws
Bi-Metal Concrete Screw, Indented Hex Washer Head
SS316 + SS420 concrete screw, indented hex washer head with serrations, ceramic coated 500/1,000 h, 5.5 × 40 mm.
- Body
- SS316
- Tip
- SS420
- Head
- Indented hex washer with serrations
- Thread
- UNC
- Size
- 5.5 × 40 mm standard
- Coating
- Ceramic 500 h / 1,000 h
- 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 anchoring facades, rails and brackets into concrete where corrosion would compromise a carbon steel screw. Serrations under the head resist loosening.
Applications
- Facade brackets
- Railings
- Coastal concrete
Used in these projects
Key features
- A4 body, hardened cutting thread
- Serrated head locks
- Two coating grades
- Custom lengths
Specifications
Typical values. Every dimension, hardness and coating is confirmed in writing with your quotation.
| Body | SS316 |
|---|---|
| Tip | SS420 |
| Head | Indented hex washer with serrations |
| Thread | UNC |
| Size | 5.5 × 40 mm standard |
| Coating | Ceramic 500 h / 1,000 h |
| Packing | Bags, boxes, buckets |
| MOQ | 10,000 pcs |
| HS code | 7318.14 / 7318.12 (by type) |
Buying guide
Applies to all concrete & masonry screws.
Hole size matters
Drill the hole to the diameter we specify for each screw (for example 5/32" for 3/16" screws, 3/16" for 1/4"). An oversized hole costs most of the pull-out strength.
Embedment depth
Allow at least 25 mm embedment for light fixings and 32–44 mm for structural ones, and keep 2× embedment from free edges.
Corrosion
Blue or silver ceramic coatings suit interior and protected exterior use. For wet or treated concrete use stainless bi-metal screw anchors.
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
Do concrete screws need an anchor plug?
No. They tap their own thread directly into the masonry hole. Only the drill hole is needed.
Can concrete screws be reused?
They can be removed, but we recommend a new screw for structural re-installation because the thread wears.
What diameters do you supply?
3/16" and 1/4" masonry screws, and 6–14 mm screw anchors, in lengths up to 300 mm.
Concrete & Masonry Screws
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Request for quotation
Request a quotation for Bi-Metal Concrete Screw, Indented Hex Washer Head
Tell us the screw, size and quantity. A sales engineer replies within one business day with price, lead time and a sample offer.
- Emailinquiry@china-screw-factory.com
- WhatsApp+86 176 2154 1688
- Phone+86 176 2154 1688