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Interlock Assa Abloy Replacement Door Hardware

Interlock locks and handle sets came on aluminum and vinyl swing doors. Measure from the middle of the lever to the middle of the key, 85mm or 92mm, then pick the page for the part you need.

  • If the lock in the door edge has stopped working, open Interlock Multipoint Locks.
  • If the door edge shows one lock case and nothing above or below it, open Interlock Single Point Locks.
  • If you need handles, open Interlock Door Handle Sets for the Aria, Summit and Verona.

Need help? Send photos

Photograph the door edge and measure the backset. We'll confirm the lock before you order.

Send photosor call 727-386-4629

About Interlock

Stuart Young and Ron Davis founded Interlock in New Zealand in 1961, and ASSA ABLOY bought the company in 2001. In the US, Interlock USA is now part of ASSA ABLOY Fenestration, which still uses the Interlock name for its swing door, patio door and window hardware.

Interlock Parts We Carry

Which Interlock Do You Have?

  • Measure from the center of the lever to the center of the key. Most Interlock locks read 85mm (3-11/32 inches), and some read 92mm (3-5/8 inches).
  • Measure the backset, from the door edge to the center of the spindle.
  • Measure the length of the faceplate on the door edge.
  • If lifting the lever throws the bolts and pulls the door tight against its seal, you have a lever compression lock.

You can tell the handle sets apart by look. The Aria has narrow straight plates and straight levers, the Summit has levers that taper and curve down, and the Verona has plates with rounded ends and levers that curve back toward the door.

Before Ordering

  • Measure from lever to key: 85mm or 92mm.
  • Measure the backset and the faceplate length.
  • Photograph the lock on the door edge and both faces of the handles.
  • Note whether bolts go into the head and sill or the lock works at the handle only.

Why Buy From Multipoint Door Hardware?

  • We carry Interlock locks and handle sets, so you can repair the door in one order.
  • Send photos through our Identify My Part form and we will confirm the part before you order.
  • Every listing gives the measurements that decide fit, so you can check your door before you buy.

FAQ's About Interlock Door Hardware

Is Interlock part of ASSA ABLOY?

Yes. ASSA ABLOY bought Interlock in 2001, which is why you will see the locks sold as Interlock Assa Abloy.

What happened to Interlock USA?

Interlock USA is now part of ASSA ABLOY Fenestration, which keeps Interlock as a product name. We carry the Interlock swing door locks and handle sets on these pages.

Is my lock 85mm or 92mm?

Measure from the center of the lever to the center of the key cylinder. 85mm reads 3-11/32 inches and 92mm reads 3-5/8 inches. A handle set only fits a lock with the same spacing.

Do the multipoint locks come with shootbolt rods?

No. Each lock comes as the lock case, and you reuse the shootbolt rods from your door.

My door will not lock when I lift the lever. What should I check?

Open the door and lift the lever while you watch the edge. If the bolts throw with the door open but not with it closed, the door is out of line with its strikes and needs adjusting. If nothing moves with the door open, the lock case has failed.

How do I identify my part?

Photograph the lock on the door edge with the door open and both faces of the handles, then measure from lever to key. Send it through our Identify My Part form and we will confirm the correct part before you order.