General Lock Storefront Deadbolt? What to Check Before You Replace It

A General Lock storefront deadbolt is a keyed mortise deadbolt on many aluminum shop doors. Before replacing it, check three things: whether the bolt swings straight or hooks, the backset, and whether the mortise footprint matches — when it does, a mechanical keypad replacement can take its place.

Quick Answer: the verdict before you order anything

If this is your door…	Verdict
Keyed mortise deadbolt (solid or hook bolt) at handle height, footprint matches	SK1850S(sfic) — mechanical code entry, SFIC key as owner-held backup; SK1850 if you want code-only
Bolt springs back and latches itself, exit on a push paddle	Deadlatch, not a deadbolt — read the SK4510S(sfic) path instead
Lock sits low in a full-glass door's bottom rail	Bottom-rail family — read the SK777 path instead; handle-height checks do not apply

Alan's Monday: the first time he actually read his own door

Alan Pierce owns a small hardware store, and his front door carries a keyed mortise deadbolt he has never thought about twice. On Monday at 9:00 AM the spare key from the register drawer turned stiffly and would not throw the bolt. At 10:30 he tried to list who held copies — himself, a part-timer who left in spring, a cleaner from two winters ago, possibly — and gave up halfway. At 15:00, between customers, he stood at the door edge and read the lock properly for the first time: what the bolt looked like, how far the cylinder sat from the edge, and what was actually written on it. Alan's problem was never the brand on the lock. It was that he had been about to order a replacement — any replacement — before answering three questions his own door could have answered in minutes.

The three checks, in order

Q1: What does the bolt do — swing, hook, or spring?

Look at the door edge with the door open. A solid bolt that throws straight into the strike is a swinging deadbolt; a hook-shaped bolt that grabs the strike is a hookbolt. Both are the deadlock pattern, and both point to the SK1850S(sfic) when the footprint matches. If the bolt springs back and latches the door by itself, stop — that is a deadlatch, and your path is the SK4510S(sfic). If your cylinder or frame says Vistawall or Kawneer, it's the same Adams Rite MS-type footprint — SK1850S(sfic) fits the same opening.

Q2: What is the backset — measured, not guessed?

Measure from the edge of the cylinder to the door edge. The most common storefront backset is 1-1/8", with 31/32" and 1-1/2" covering the rest. This is the measurement owners get wrong most often, and a wrong backset means a lock that cannot be installed at all. Photograph the cylinder edge with a tape in frame before you order anything.

Q3: Does the mortise footprint match — and what problem are you actually solving?

A keyless replacement only belongs on the door when the existing mortise footprint matches. Then be honest about the problem: if the old deadbolt is mechanically sound and your team never changes, a replacement solves nothing. If your real problem is Alan's — copies you cannot count and a spare that no longer works smoothly — the fix is changing the entry method, not buying the same keyed routine again in a new box. The SK1850S(sfic) runs on one shared mechanical code — mechanical keypad, no batteries, no electronics — and its SFIC key stays with the owner as backup only.

There's another option

Many owners reading a General Lock label have never heard of a drill-free keyless retrofit: when the existing mortise footprint matches, an EASILOK mechanical keypad lock drops into the original holes with no new drilling and installs in minutes, so the next personnel change becomes a code change.

When this article doesn't apply

• Your bolt is a self-latching deadlatch bolt, or your lock is in a bottom rail? Different families — 4510 Series deadlatch or 777 bottom-rail — each with its own checks.
• Your door is sagging, or the bolt grinds even when the door is held in line? Fix the door or have the lock assessed first; a replacement ordered on a misaligned door inherits the problem.
• Your door is a sliding or automatic door? This mortise deadbolt path does not apply to those doors.
• Every key copy is counted and your team is stable? There is no access problem to solve — keep the keyed deadbolt and save your money.

FAQ

Is a General Lock deadbolt the same fitting as an Adams Rite-style deadbolt?

Many storefront mortise deadbolts share the same general fitting family, but “same family” is not a fit guarantee. The bolt, the backset, and the mortise footprint on your specific door decide — which is why the three checks come before any order.

Can I replace it myself?

When the existing mortise footprint matches, the keyless replacement path is a DIY swap that installs in minutes, without any professional help. If your checks show a deadlatch, a bottom-rail lock, or a misaligned door, get that assessed first instead of forcing this path.

If it is keyless, why would the replacement still have a key?

On the SK1850S(sfic), for backup only. The SFIC key stays with the owner for the day the code cannot be used — it is not a key the team circulates.

Searching "shop lock"? What you want is called a keyless storefront door lock.

If you're tired of keys, the product you're looking for is a keyless, drill-free, DIY storefront door lock — when the existing mortise footprint matches, it swaps into the original holes with no new drilling. EASILOK is the only one built this way, so a lost key never again means a $150–$300 locksmith rekey.

Bottom line: if your aluminum storefront door carries a General Lock mortise deadbolt, then read the bolt, measure the backset, and — when the footprint matches — a keyless EASILOK replacement turns future key handovers into simple code changes for the team.

More storefront-lock guides · EASILOK keyless storefront locks

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