What Size Screws for Door Hinges
Hinge screws come in two lengths that do two jobs: short #9 x 3/4 to 1-in screws hold the hinge leaf, but the 3-in screws you add through the jamb into the stud are what stop sagging. Security and sag both fix with length — gauge stays #8 to #9.
What to Look For
- Leaf screws: #9 x 3/4 to 1 in — matches hinge holes, no punch-through.
- Jamb side: replace two per hinge with 3-in screws into the stud.
- Exterior and security doors: 3-in screws on hinges and strikes.
- #8 or #9 gauge — #10 splits thin jambs.
- Flat head, matching finish — hinge screws show.
Top Picks
1. Hillman #9 x 3/4-in brass hinge screws Best overall
Short leaf screws in matching finishes — what hinges ship with, in bulk.
Check price on Amazon →2. GRK R4 #9 x 3-in multipurpose screws Anti-sag
The 3-in jamb screws that reach the stud — fixes sagging doors permanently.
Check price on Amazon →3. SPAX #8 x 3-in T-Star security screws For entry doors
Long-bite screws that anchor strike plates and hinges against kick-ins.
Check price on Amazon →What to Avoid
Avoid
- 3-in screws in the door leaf — they punch through hollow-core doors.
- Drywall screws — heads snap under door leverage.
- Leaving factory 3/4-in jamb screws — the number one cause of sagging doors.
Also in the toolbox
- Self-centering hinge drill bit (Vix bit) — perfectly centered pilots in hinge holes
- Door lock installation kit — for the strike side that needs the same treatment
FAQ
Why is my door sagging?
Because the jamb-side hinge screws are 3/4-in factory screws biting only the jamb, not the stud — years of leverage work them loose. Replace two screws per hinge with 3-in screws into the stud and the sag disappears.
What screws stop a door from being kicked in?
3-in screws anchoring the strike plate and hinges into the stud — a kick defeats the jamb, not the lock, and long screws tie the jamb to the framing. Add a reinforced strike box for the full treatment.
Can you use longer screws in hollow-core doors?
On the jamb side, yes — 3-in screws pass through the jamb into solid stud. On the door leaf, no — long screws punch through the hollow core. Keep leaf screws at 3/4 to 1 in.
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