How to Get a Metal Small File Cabinet Drawer Interlock

Having trouble opening more than one drawer at a time on your metal file cabinet? A small metal interlock bar is likely missing or broken. Replacing this crucial part is an easy DIY fix to restore proper file cabinet functionality.

What is a Drawer Interlock?

A drawer interlock is a metal bar that prevents more than one drawer on a filing cabinet from being opened at the same time. This safety feature keeps the cabinet balanced and prevents tipping.

On lateral (side-to-side) filing cabinets, the interlocking bar runs horizontally along the drawer slides. On vertical cabinets, it runs vertically. When one drawer is open, the bar blocks the remaining drawers from opening by blocking their slide mechanisms.

Interlocks are usually made of steel and may be a removable part or integrated into the cabinet frame. Over time, these bars can break or go missing, disabling the safety feature. Replacing a damaged or lost interlock is an easy repair.

When to Replace a Drawer Interlock

Signs that a file cabinet interlock needs replacement:

• You’re able to open multiple drawers at once.
• Drawers feel loose and slide open easier than normal.
• You notice a broken/missing metal bar along the drawer slides.
• The cabinet rocks or tips forward when a lower drawer is open.

A damaged interlock compromises the cabinet’s stability and increases the risk of tip-over injuries. It’s recommended to replace immediately before using the filing cabinet.

How to Replace a Small Metal Drawer Interlock

Replacing a broken or missing interlock on a small filing cabinet is a fast, easy DIY project with minimal cost. Follow these steps:

1. Purchase a replacement interlock

You’ll need to buy a new interlock bar that fits your cabinet. Bring the make/model of your filing cabinet when going to a hardware store or shop online. The replacement part is often under $10.

For lateral cabinets, you’ll need a horizontal interlock bar sized to fit across your drawer frame. For vertical cabinets, get a vertical interlock strip.

2. Remove the broken interlock

If part of the old interlock is still attached, fully detach it from the drawer slides. This may require unscrewing brackets or gently prying off broken pieces. Removing any remaining debris improves the fit of the new part.

3. Install the new interlock

Slide the new metal bar onto the drawer frames as instructed. Tap lightly with a mallet if needed to secure in place. Insert and tighten any screws. If the interlock sits loosely, use a strip of foam/rubber to create added friction and hold it in position.

Test that the locking mechanism works by trying to open multiple drawers at once. The new interlock should successfully block adjacent drawers.

4. Test for tipping

Once installed, load the bottom drawers with weight (books, paper, etc) and open each fully to ensure the cabinet remains firmly grounded. The new interlock should prevent any rocking, tipping or instability.

And that’s it! With a new interlock installed, your file cabinet will open smoothly, close securely and prevent the hazards of tipping. Safety and proper performance is restored.

FAQ About Small Metal File Cabinet Interlocks

Here are answers to some frequently asked questions about replacing broken or missing interlocks:

What are file cabinet interlocks made of?

Most interlocks are steel, but some are sturdy plastic on inexpensive cabinets. Metal bars are more durable.

Where can I buy a replacement interlock?

Hardware stores sell them in the cabinet hardware section, or find online at parts supplier websites by searching your exact cabinet brand and model #.

My interlock is attached to the frame, can it be replaced?

If integrated into the cabinet, you may need to contact the manufacturer to source a replacement part. Some integrated types allow you to pop out the old bar and snap a new one in.

Do replacement interlocks come with screws?

It depends on the type, but most include necessary brackets, screws or adhesive strips for attaching the new bar to the drawer frames.

Should I replace all interlocks or just the broken one?

Just swap out the damaged/missing part. But inspect other interlocks for wear and proactively replace if they are also showing signs of failure.

How can I prevent interlock damage in the future?

Avoid excessive strain on interlocks by opening one drawer at a time. Never try to force multiple drawers open when properly locked by the bar.

How much weight can an interlock support?

It depends on material and size, but typically they safely support 100+ lbs in large commercial-grade filing cabinets. Don’t overload small home-office drawers beyond capacity.

Conclusion

A broken or missing file cabinet interlock can lead to tipped furniture, property damage, and serious injury risk. But a damaged interlock bar is easy and inexpensive to replace yourself. Take a quick trip to the hardware store, swap in a new metal bar sized for your exact cabinet, and restore proper anti-tip functionality. With a simple interlock replacement, you can continue using your filing cabinet safely and confidently.