CompX National 1-7/16″ Brass Cam Lock, Keyed Alike #642

The CompX National 1-7/16” cam lock (#642 keyed-alike system) solves a common contractor headache: managing multiple keys across cabinet installations. With its 1-7/16 inch cylinder length and ability to handle panels up to 1-1/8 inches thick, this lock handles commercial-grade cabinet construction while letting crews operate every lock with the same key.

Multi-Unit Efficiency with Keyed-Alike #642 System

The #642 keyed-alike functionality transforms how contractors handle large installations. Install twenty locks across an office complex or school, and they all work with the same key. No fumbling through key rings. No labeling nightmares. No callbacks because someone lost the key to cabinet seventeen.

Compatible with National D8785 / ESP ES8 blanks, contractors can get replacement keys cut at any competent locksmith. The system also offers flexibility with alternative KA codes (#415, #413, #420) when projects need different keyed-alike groups.

For Montana’s unheated workshops and storage buildings, the key removable in both locked and unlocked positions prevents the common winter problem of locks freezing with the key trapped inside. Pull the key out regardless of position — no more frozen-in keys when temperatures plummet.

Flexafunction Design Adapts to Any Cabinet Configuration

The Flexafunction feature allows selection between 90 degrees or 180 degrees rotation, meaning one lock model handles both overlay doors (90-degree) and drawers (180-degree). Reversible for right or left hand doors, contractors stock one SKU instead of four different configurations.

The kit includes both 1-1/2” straight cam and 1-1/8” formed (offset) cam, covering flush-mount and lipped applications without additional purchases. This versatility matters when you’re halfway through an installation and discover the architect changed the door spec.

Specifications

Specification	Value
Cylinder Length	1-7/16 inches
Maximum Material Thickness	1-1/8 inches
Bore Diameter	3/4 inch
Rotation Options	90 degrees or 180 degrees (Flexafunction)
Key Type	Keyed Alike #642 (C642A)
Material	Die-Cast Zinc
Weight	0.240 lbs
Door Compatibility	Reversible for right or left hand doors

Installation and Included Components

Installation follows standard cam lock procedure: Drill 3/4” hole, insert cylinder from front, align washers (spur washer for wood applications), secure with mounting nut from back, attach chosen cam and stop washer.

The kit includes: 2 Keys (#642), trim washer, spur washer, mounting nut, 1-1/2” straight cam, 1-1/8” formed (offset) cam, 2 stop washers. The spur washer bites into wood to prevent the lock from spinning — crucial detail for solid wood cabinet doors.

Finish Options for Montana’s Design Variety

Available in Polished Brass (US3), Antique Brass (US4G), or Bright Nickel (US14A), the lock matches both rustic lodge aesthetics and modern commercial builds. Antique brass suits Montana’s timber frame and log home market, while bright nickel fits contemporary office installations.

Frequently Asked Questions

What other cylinder lengths does CompX National offer? Size variations include 7/16”, 15/16”, 1-3/16”, and 1-3/4” cylinder lengths. Choose based on your cabinet material thickness.

Can I get these keyed differently instead of keyed-alike? Yes, CompX National offers Keyed Different (KD) and Master Keyed (MKKD) variations. Keyed different makes sense for residential installations where security between units matters.

What’s the actual review rating on these locks? Customer reviews show a 5.0/5.0 rating, with users noting the “product arrived as described and worked perfectly for the cabinet application”.

Why die-cast zinc instead of brass throughout? Die-cast zinc provides adequate strength for cabinet applications while keeping costs reasonable. The internal mechanism matters more than the housing material for a cam lock.