BEST 1E-74 Mortise Cylinder Housing - 1-1/4 Inch for 6 or 7 Pin Cores

About this item

The BEST 1E74 is the standard mortise cylinder housing for BEST interchangeable core systems. It's a 1-1/4 inch, 7-pin SFIC housing machined from solid brass or bronze bar stock, and it fits any application where a BEST small format interchangeable core needs a mortise-format home: locks, exit devices, exit device trims, and padlocks. If you're running a BEST master key system across a building, this is the cylinder housing the system is built on.

The housing ships less core. A BEST 1C Series SFIC core or any compatible 7-pin BEST interchangeable core must be ordered separately. This is standard for institutional keying systems where cores are managed centrally and swapped between housings as access assignments change. The core drops in and locks without tools, which is one of the practical advantages of interchangeable core systems over conventional cylinders.

Construction and Security Features

BEST cylinders are machined from brass or bronze bar stock to tight tolerances. That machining process gives the housing consistent dimensions across production runs, which matters when cores need to drop in and seat cleanly across hundreds of cylinders on a large campus or building complex. Corrosion resistance is built into the alloy, not applied as a coating.

A diagonal set screw mounts in the cylinder wall. When tightened, it locks the cylinder securely in the housing and prevents the cylinder from rotating under forced entry. That's a detail that separates BEST housings from lower-grade mortise cylinders that rely on the cam and tailpiece alone to hold position. The standard ring package (RP3) is included with every housing. Rings allow the cylinder to be adjusted for different door preparations and lock body types without additional hardware.

Available Cam Options for the BEST 1E74

The cam determines what type of lock body or exit device trim the 1E74 works with. This is the selection that most buyers get wrong when ordering. Choose based on the lock or exit device the cylinder installs into:

Full Specifications

Part Number Variations for the 1E74

The 1E74 appears in catalogs and spec sheets under several part number formats: 1E-74, 1E+74, 1E74, and 1/74. All refer to the same housing. The full model string includes the cam suffix and finish code. For example, 1E74C4RP3626 is the standard straight cam (C4), ring package 3 (RP3), in satin chrome (626). The 1-3/8" length version is model BEST 1E-74-22, specified when the door prep requires the longer cylinder projection.