Pocket Hole Screw
Screws · pocket screw · Kreg screw · joinery screw
Definition: A pocket hole screw is a self-tapping screw with a flat washer head and square drive, made to pull two pieces of wood tight through an angled pocket hole.
Anatomy
■ Head■ Shank■ Threads■ Point
Governing standards: Manufacturer specified (no universal standard)
Common Sizes
| Inch | Metric | Head width | Head height |
|---|---|---|---|
| #6 | M3.5 | — | 3/4 to 1-1/4 long |
| #7 | M3.9 | — | 1 to 1-1/2 long |
| #8 | M4.2 | — | 1-1/4 to 2-1/2 long |
Representative sizes. Full dimensional data lives in the standards listed below.
Grades & Strength
| Grade | Material | Tensile (psi) | Marking |
|---|---|---|---|
| Case-hardened steel | steel | — | None |
| Zinc-plated / stainless | steel | — | None |
Materials
- Zinc-plated steel
- Stainless steel
- Coated steel
Pros & Cons
Pros
- Fast — the screw pulls the joint tight
- Strong mechanical joint
- Hidden fasteners
Cons
- Needs a pocket-hole jig
- Angled holes are less forgiving
- Head leaves a visible dimple unless plugged
Typical Uses
- Cabinet face frames
- Furniture joinery
- Trim and molding
- DIY projects
Alternatives & Related
- Wood Screw — Direct face-to-face screwing without a jig
- Deck Screw — Outdoor structural screwing
Where to Buy
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FAQ
What is the best pocket hole screw size?
A #8 x 1-1/4 in screw in 3/4 in stock is the most common. Use #7 for finer work, and pick a length that ends mid-way through the second board.
Coarse or fine thread pocket screws?
Coarse thread for softwood and plywood; fine thread for hardwood, where it resists splitting in dense grain.