Drywall Screw Bugle Phillips Head Fine Thread Grey Phosphate
Grey phosphate fine thread drywall screw for plasterboard onto steel studs.
Fine thread is the classic steel stud drywall screw. A finer pitch puts more threads into the thin wall of a steel stud, and more threads means more engagement before the screw has any chance to strip. In timber the same screw would be the wrong choice; in steel it is the default.
The old site lists this item specifically as the grey phosphate version, distinguishing it from the other fine thread listing in the same family. Grey phosphate behaves like black phosphate in the hand: a light protective layer with useful bit friction.
Why buyers choose it
- Fine pitch maximises thread engagement in thin steel studs
- Grey phosphate finish gives bit grip on high-volume runs
- Bugle head spreads seating load and avoids tearing the board paper
- 3.5 to 4.8 mm diameters and 10 to 180 mm lengths
Send the stud material, the total board thickness and the finish and the size will be confirmed against the closest standard before quoting. Samples of this item are free of charge.
Specification
| Standard | DIN, ANSI and others |
|---|---|
| Size | 3.5~4.8mm, 6#~10# |
| Length | 10-180mm (3/8”- 7”) |
| Material | C1022+ heat treatment |
| Head Type | Bugle head, pan framing head, CSK head with ribs(type 17) |
| Drive Type | Phillips, square, torx and others |
| Screw Type | BSD, CSD |
| Finish | zinc plated(clear/blue/yellow)+wax, black/grey phosphate, nickel, Ruspert |
Specification as published by Haiyan Ehons Industrial Co., Ltd.. Diameters and lengths outside the ranges shown are quoted as non-standard items.
Technical detail
| Standard | DIN and ANSI references. |
|---|---|
| Size | 3.5 to 4.8 mm, #6 to #10. |
| Length | 10 to 180 mm (3/8 in to 7 in). |
| Material | C1022 with heat treatment. |
| Finish | Grey phosphate; zinc plated with wax, black phosphate, nickel and Ruspert also available. |
Problems this screw solves
Coarse threads strip in steel
Fine pitch puts more thread flanks into the stud wall, which is what stops the strip.
Bugle heads that are too sharp tear paper
The bugle profile on this item is formed to sink into the board face and compress it rather than cut it.
Finish mismatch on refurbishment
Where an existing installation used grey phosphate, matching it avoids a visible difference under a thin skim.
Where it is used
- Single and double layer plasterboard onto steel studs
- Ceiling board onto steel furring in dry interiors
- Partition systems specified with a phosphate fastener finish
- Refurbishment work matching an existing grey phosphate fixing
Who buys it
Drywall contractors working predominantly in steel stud systems, and merchants who stock both the grey and black phosphate variants.
Quality control priorities
Thread pitch consistency is the controlling check on a fine thread screw, because an inconsistent pitch loses exactly the engagement the fine thread was chosen for. Pitch and major diameter are gauged through the rolling stage, with hardness confirmed after heat treatment.
Customisation
Screw type can be specified as BSD or CSD, and the head as bugle, pan framing or ribbed countersunk. Where the screws go to a merchant, 1 kg boxes and count packs are available alongside bulk cartons.
How it compares
Against the other fine thread listing
Same geometry and the same family; the old site distinguishes this one as the grey phosphate finish.
Against the coarse thread version
Coarse for timber studs, fine for steel. Using either in the wrong substrate is the most common drywall fastener mistake.
Against a hi-lo thread screw
Hi-Lo is better in very thin gauge and in board itself; fine thread is the standard answer in normal steel stud.
Installation notes
Confirm the stud material first
Fine thread in a timber stud will spin. Check before the first box is opened.
Set the nose depth
Head just below the paper surface, not through it.
Do not mix finishes on one wall
Grey and black phosphate differ slightly in tone under a thin skim.
Store dry
Phosphate is a light protective layer and will surface rust in a damp carton.
Frequently asked questions
How does this differ from the other fine thread drywall screw?
Fine or coarse thread for steel studs?
What sizes are available?
What material is used?
Can I get these in count packs?
What is the minimum order?
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Minimum order 500 kg for this item.