• 20 parts
  • Checked September 2026

Parts of a Door

One door from inside, its latch edge beside the jamb, and a cut through the sill.

Parts of a Door

Name Date

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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Write the name of each numbered part.Answer key

  1. Head jamb
  2. Side jamb
  3. Sill
  4. Threshold
  5. Casing
  6. Stop
  7. Stile
  8. Top rail
  9. Lock rail
  10. Bottom rail
  11. Muntin
  12. Panel
  13. Hinge
  14. Handle
  15. Escutcheon plate
  16. Latch
  17. Deadbolt
  18. Strike plate
  19. Weatherstripping
  20. Sweep

Drawn for this site by script, 2026-09-26. Licence: own work.

Each numbered ring is a button. Use the arrow keys to move between them and Enter to choose. Names are read out in Study, and once a part is answered.

Next step Next: the storm door that hangs outside it

All 20 parts on the diagram

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Start here: 9 main parts 9

  1. Head jamb The top of the frame. A door frame's height is measured from its top edge.
  2. Side jamb Carries the hinges on one side, the strike plate on the other.
  3. Sill The frame's base, on the subfloor; the threshold covers it.
  4. Threshold Covers the sill and slopes to the outside to shed water.
  5. Casing Room-side trim over the gap between frame and wall. Outside, brick mould does the same job.
  6. Stop Keeps the door from swinging past the frame when it closes.
  7. Stile Hinges go on one stile, the handle and lock on the other.
  8. Panel Fits in grooves in the stiles, rails and muntin. Four on this door.
  9. Hinge Lets the door swing; three on a full-height door.

The door and frame 7

  1. Top rail Joins the two stiles above the upper panel.
  2. Lock rail The middle rail, at lock height.
  3. Bottom rail The widest rail, also called the kick rail.
  4. Muntin Splits the door into two columns of panels, from rail to rail.
  5. Handle It turns the latch. With the lock and strike plate it is part of the lockset.
  6. Escutcheon plate Decorative plate over the lock's workings where the handle meets the door.
  7. Deadbolt Throws a bolt from the door's edge into the jamb. Separate from the latch.

Jamb and sill 4

  1. Latch Springs into the strike plate as the door shuts. The handle pulls it back.
  2. Strike plate Strengthens the jamb where the latch and the deadbolt enter it.
  3. Weatherstripping A flexible seal between door and frame against draughts and rain.
  4. Sweep Closes the gap between the bottom of the door and the threshold.

How this list was compiled: Read 2026-09-26. (1) A door maker's parts-of-a-door glossary, https://www.pella.com/ideas/doors/entry-doors/parts-of-a-door/ : door frame of head, jamb and sill; threshold covers the sill and slopes to the outside; rails and stiles (lock, latches and hinges on the stiles); hinge; casing (interior trim) and brickmould (exterior trim); weatherstripping between panel and frame; door sweep at the very bottom against the threshold; lockset, deadbolt, latch, mortise plate, strike plate on the jamb where the bolt meets. (2) A second maker's front-door glossary, https://www.andersenwindows.com/ideas-and-inspiration/blog/tips/parts-of-door : side jamb, head jamb, sill, threshold (on top of the sill), rail, stile, panel, handle, lockset, hinge, strike plate, casing, brick mould, stop, weatherstrip (the one at the bottom sometimes called the door sweep). (3) Wikipedia, Door, https://en.wikipedia.org/wiki/Door : stiles (hanging stile and latch stile), top rail, bottom rail (kick rail), lock rail at the height of the bolt, panels in grooves in the stiles and rails; jambs, head jamb, threshold; doorstop, a slat inside the frame so the door cannot swing through; and Jamb, https://en.wikipedia.org/wiki/Jamb . Licence: own work

The drawing: Drawn for this site by script, 2026-09-26. Licence: own work

How it works

A door is two things: the frame fixed in the wall and the door that swings in it. This drawing numbers 20 parts of a door and frame, from the head jamb to the sweep, as the trade names them.

Read the full guide

The parts of a door frame

The head jamb crosses the top, a side jamb stands each side and the sill lies on the floor, covered by the threshold. The stop runs round the jambs for the door to shut against, and casing trims the room side.

The door itself

Stiles run up both edges: hinges on one, handle and deadbolt on the other. The top rail, lock rail and bottom rail cross between them, and a muntin splits the space into four panels.

Questions and answers

What are the names for parts of a doorway?

The doorway is the opening. Round it, the head jamb, two side jambs and the sill make the frame; the threshold covers the sill, casing trims the room side, and brick mould trims the outside.

What are the parts of a front door?

The same frame and door as an inside door, plus the parts that face the weather: weatherstripping along the stop, a sweep under the door, a threshold sloped to shed water, and usually a deadbolt.

What is the difference between a sill and a threshold?

The sill is the bottom of the door frame, resting on the subfloor. The threshold is the cap fixed over it, the strip you step across, sloped so water runs to the outside.

Why will my door not latch?

The latch comes out of the door's edge at the height of the strike plate on the jamb, and the bolt of the deadbolt meets a second plate above it. If the door will not latch, the plate has often drifted out of line.

Which parts of a door wear out first?

Thresholds and hinges, one door maker says: a threshold takes foot traffic and weather, and hinges carry the weight of the door on every swing and can rust. Replacing either is a common repair.

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