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Not the actual product photo. Real product photography coming soon. Specifications and pricing below are accurate.
#7x1-5/8" Metal Joist Screws
410 Grade, #3 drill point tip, T15 Star Drive, Xylon Coated
Select Size
Choose your preferred size and quantity below.
Shadowline Black
100 Box
MJS7x1.625-100-BL
$24.17
per unit
350 Box
MJS7x1.625-350-BL
$74.34
per unit
1050 Box
MJS7x1.625-1050-BL
$211.84
per unit
1750 Box
MJS7x1.625-1750-BL
$337.70
per unit
Plain Stainless
100 Box
MJS7x1.625-100
$23.04
per unit
350 Box
MJS7x1.625-350
$73.15
per unit
1050 Box
MJS7x1.625-1050
$208.43
per unit
1750 Box
MJS7x1.625-1750
$332.00
per unit
Hardwood Brown
100 Box
MJS7x1.625-100-BR
$24.17
per unit
350 Box
MJS7x1.625-350-BR
$74.34
per unit
1050 Box
MJS7x1.625-1050-BR
$211.84
per unit
1750 Box
MJS7x1.625-1750-BR
$337.70
per unit
About this product
These specialized self-drilling fasteners are engineered to secure dense tropical hardwood decking directly to metal joist systems, such as steel or aluminum. By featuring a reinforced drill point, they eliminate the need to pre-drill the metal subframe, providing a high-strength solution for contractors building modern metal-framed decks and rooftop installations. They are specifically designed to work in conjunction with DeckWise hidden fasteners or for face-screwing applications where a metal substructure is utilized.
Manufacturer Specifications
- Material
- 410 Stainless Steel
- Dimensions
- #7 x 1-5/8 inch
- Drive Type
- T15 Star Drive
- Head Type
- Small Trim Head
- Point Type
- #3 Self-Drilling Point
- Joist Compatibility
- Aluminum or Steel up to 12 gauge (0.109 in.)
- Finish Options
- Plain Stainless, Hardwood Brown, Shadowline Black
Best used for
- 1Installing Ipe or Cumaru decking on rooftop pedestal systems utilizing aluminum joist tracks.
- 2Securing Massaranduba or Garapa boards to light-gauge steel framing in commercial boardwalk applications.
- 3Fixing Tigerwood or Red Balau cladding to metal hat channels or furring strips for rainscreen siding projects.
- 4Building high-traffic residential decks where a steel subframe is used to achieve longer spans than traditional timber.
Pro tips for dense hardwoods
- While these screws are self-drilling for the metal joist, you must still pre-drill a pilot hole through the tropical hardwood decking to prevent the wood from splitting and to ensure the screw head seats flush.
- Use a clutch-indexed drill rather than an impact driver to avoid over-torquing and snapping the heads once the screw engages the metal.
- For seaside applications within 15 miles of saltwater, verify if 410 grade stainless is sufficient for your local building code, as 316 grade is typically preferred for extreme marine environments.
Specifications
- Brand
- DeckWise
- Category
- Screws & Fasteners
- Options available
- 12 sizes / package counts
Per-option details
| Option | SKU | Piece count | Dimensions | Weight |
|---|---|---|---|---|
| Hardwood Brown | MJS7x1.625-350-BR | 350 Box | — | — |
| Shadowline Black | MJS7x1.625-1050-BL | 1050 Box | — | — |
| Shadowline Black | MJS7x1.625-100-BL | 100 Box | — | — |
| Plain Stainless | MJS7x1.625-100 | 100 Box | — | — |
| Hardwood Brown | MJS7x1.625-1050-BR | 1050 Box | — | — |
| Plain Stainless | MJS7x1.625-350 | 350 Box | — | — |
| Plain Stainless | MJS7x1.625-1050 | 1050 Box | — | — |
| Shadowline Black | MJS7x1.625-1750-BL | 1750 Box | — | — |
| Hardwood Brown | MJS7x1.625-100-BR | 100 Box | — | — |
| Shadowline Black | MJS7x1.625-350-BL | 350 Box | — | — |
| Hardwood Brown | MJS7x1.625-1750-BR | 1750 Box | — | — |
| Plain Stainless | MJS7x1.625-1750 | 1750 Box | — | — |
Piece counts and dimensions are as supplied by the manufacturer for each package option.
Why Choose Screws & Fasteners?
How to Face-Screw Hardwood Decking
Pre-Drill Every Hole
Dense hardwoods (1,500+ Janka) will split without a pilot hole. Use a countersink bit sized for your screw shank — this is non-negotiable for Ipe, Cumaru, and similar species.
Choose Stainless Steel
Carbon steel screws corrode and stain hardwood within months. Always use Type 316 stainless steel — it offers the best corrosion resistance for exotic hardwoods and coastal environments. The slight premium pays for itself in zero staining and no fastener failures.
Drive to Depth — Not Beyond
Set screws flush with the surface or just barely countersunk. Over-driving creates water-collecting craters that accelerate checking around each hole.
Two Screws Per Joist Crossing
Place one screw roughly 1″ from each board edge at every joist. This prevents cupping and ensures the board stays flat over time.
Pro Tip from Our Deck Specialists
Apply a drop of wax or soap to each screw tip before driving — it dramatically reduces friction and prevents snapped screw heads in ultra-dense wood like Ipe.
Screws & Fasteners — Common Questions
Frequently Bought Together
Accessories that pair well with screws & fasteners for a complete installation.
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Expert Support
Call 1-844-674-4455