Last updated: July 2026
Uneven drywall, service voids and off-centre studs are common headaches in North-American homes - especially when you’re installing base cabinets, bathroom vanities or freestanding storage units. A cabinet spacer - specifically the Space-Plug Adjustable Spacer Fixing - bridges those gaps cleanly, eliminating shims and ledger strips. This guide shows you how a cabinet spacer works, how to pick the right Mini, Regular or XL size, and where to buy one with Prime delivery.
Not shelf pins! Search results for “cabinet spacer” also show hinge shims and shelf-pin pads. Here we’re talking about gap-bridging wall fixings that tighten a floor-standing cabinet back to a stud through drywall.
What exactly is a Space-Plug Adjustable Spacer Fixing?
Often called a cabinet spacer in search results, the Space-Plug Adjustable Spacer Fixing is a rigid polypropylene sleeve that sits between the back of a floor-standing unit and the wall stud. It:
- Bridges gaps of 15 mm – 80 mm (⅝″ – 3″).
- Guides one fixing screw - no double-drilling.
- Tightens the cabinet against the wall without crushing melamine backs.
- Eliminates loose shims, off-cuts and toggle anchors.
Cabinet spacer size chart
| Gap behind cabinet | Recommended spacer | Typical uses |
|---|---|---|
| 15 – 35 mm (⅝″ – 1⅜″) | Mini | Flush-fitted cabinets, tight service voids |
| 30 – 50 mm (1¼″ – 2″) | Regular | Standard 2 × 4 stud walls with drywall |
| 45 – 80 mm (1¾″ – 3″) | XL | Deep plumbing chases or retrofits |
Why installers love cabinet spacers
- No ledger strip – walls stay intact; nothing extra to paint.
- One-person friendly – hold, drill, tighten without a helper.
- Protects edge-banding – a clean ½″ hole instead of a notch.
- Saves 10–15 minutes per unit – fewer parts, fewer readjustments.
Quick-fit steps (4-step method)
- Drill straight through the cabinet back or side and drywall, centred on the stud mark.
- Thread your screw & locate the stud through the spacer body.
- Unwind to fit – unwind the cabinet spacer out until its flange meets the carcass.
- Tighten up! Drive the screw until the Space-Plug Adjustable Spacer Fixing locks the unit snug against the wall.
FAQs
Is Space-Plug the same as a cabinet spacer?
Yes. “Cabinet spacer” is the shorthand many installers use when searching online. The Space-Plug Adjustable Spacer Fixing is the original gap-bridging sleeve designed for base units, vanities and freestanding furniture.
Which screw length should I use?
Choose a screw long enough to pass completely through the spacer, cabinet back and drywall, then embed at least 1½″ (38 mm) into solid wood. Hold the screw beside the “stack” before drilling - if the threads still cover that 1½″ inside the stud, you’re good.
How many spacers does one cabinet need?
Most 600–900 mm (24–36″) base cabinets need just one spacer centred on a solid stud. For wider units or stone tops, add a second spacer at the opposite stud for extra support.
Can I use spacers with ⅝″ (15 mm) drywall?
Yes. Drill the same ½″ (13 mm) pilot hole; the screw length rule still applies. The spacer flange prevents the thicker drywall from crushing when you tighten.
Do cabinet spacers work with metal studs?
They do - use self-drilling #10 (or #12) screws rated for 25–20 ga metal framing. The spacer still centres the screw and controls clamp pressure.
Are spacers reusable?
Yes. If you remove the cabinet later, back the screw out and the spacer will unscrew. Check the threads and re-use if undamaged.
What about moisture in bathrooms?
The spacer is moulded from polypropylene, which doesn’t corrode. Use a stainless or coated screw, and you’re safe for damp-area vanities.
Does the spacer replace floor levelling feet?
No - the spacer handles the rear or side wall gap. You may still shim or adjust the front feet to get the worktop perfectly level.
Can I get Prime delivery in Canada & USA?
Yes. The Mini, Regular and XL size ships from Amazon.ca and Amazon.com with next-day Prime to most provinces.
Buy Space-Plug adjustable cabinet spacers on Amazon
Need side-fixing or drywall-stud tips? Explore more guides in our North-America blog hub.
