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Frequently Asked Questions

What is an IC housing?

An IC housing is a cylinder shell that holds an interchangeable core (IC). At National Lock Supply, we stock housings for mortise, rim, and deadbolt locks, compatible with SFIC and LFIC cores.

How do IC housings compare to conventional cylinders?

Conventional cylinders are rekeyed by disassembly. IC housings allow quick core swaps without removing the housing, saving time in large facilities.

What types exist?

SFIC (Small Format IC), common in Best-style systems, and LFIC (Large Format IC), used in Schlage and other systems.

Where are IC housings used?

In schools, government buildings, and offices where frequent rekeying is required.

Are IC housings UL certified?

Yes, many are UL-listed for fire-rated openings.

What finishes are available?

Satin Chrome, Polished Brass, and Dark Bronze.

Can IC housings be reused?

Yes, the housing is permanent—only the core is replaced.

Do they support master key systems?

Yes, interchangeable cores can be built into large-scale master key systems.

Are IC housings ADA compliant?

Yes, when paired with ADA lever hardware.

Why buy IC housings from National Lock Supply?

We supply mortise, rim, and deadbolt housings for all IC formats, ensuring compatibility with your master key system.