Grip-Rite #6 Coarse-Thread Phosphate Drywall Screw Review (2026)
By Nate Sawyer, Editor · Updated July 2026
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- Drywall
- Interior
- Wood studs
Grip-Rite's #6 coarse-thread bugle screw is the standard, cheap fastener for hanging drywall on wood studs: the coarse thread pulls sheets tight and the bugle head dimples paper cleanly for mud. But phosphate is interior-only and rusts if damp, the coarse thread is wrong for metal studs, and #2 Phillips cams out more than star drive.
Pros
- Coarse thread grabs wood studs hard and pulls sheets tight without stripping
- Bugle head dimples the paper cleanly without tearing, ready for mud
- Phosphate coating helps joint compound adhere and it is cheap by the pound
Cons
- Phosphate is interior-only and will rust if used anywhere damp or outdoors
- Coarse thread is for wood studs, not metal studs (that needs the fine-thread version)
- #2 Phillips drive cams out more easily than star drive if the depth-setter slips
Specifications
| Drive | #2 Phillips |
|---|---|
| Coating | Black phosphate (interior) |
| Length range | 1 in - 3 in (#6) |
| Head | Bugle head |
| Material | Steel |
| Thread | Coarse (for wood studs) |
| Best use | Hanging drywall on wood framing |
Frequently Asked Questions
- Why coarse thread for drywall?
- Coarse threads grab wood studs hard and pull the sheet tight without stripping. On metal studs they spin instead of biting — that job needs the fine-thread version.
- What does the bugle head do?
- It dimples the paper face cleanly without tearing it, leaving a shallow recess ready for joint compound. A flat head cuts the paper and loses holding power.
- Can drywall screws be used outdoors?
- No. Black phosphate is an interior-only coating and will rust anywhere damp. The coating's actual purpose is helping joint compound adhere to the head, not corrosion protection.