Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukee's website please click here:
Milwaukee Alkaline L-Mount Assembly
Model Number: 31-10-0023
The Milwaukee 31-10-0023 Alkaline L-Mount Assembly is a genuine OEM replacement part designed for the Milwaukee 3421 Green Cross Line Laser, Milwaukee's alkaline-powered green-beam cross line laser used by electricians, plumbers, HVAC technicians, finish carpenters, drywall installers, tile setters, and any tradesperson who needs accurate horizontal and vertical reference lines for layout, alignment, leveling, and squaring work. The L-Mount Assembly is the L-shaped mounting bracket that attaches to the bottom of the 3421 laser, providing the mounting interface that lets the operator attach the laser to a laser tripod (1/4-20 thread), wall surfaces (using the screw and nail hang holes), metal surfaces (using the integrated Rare Earth magnets), or other mounting surfaces appropriate to the layout task at hand. Without a correctly mounted L-Mount, the laser cannot be securely positioned for stable, drift-free layout work across long measuring distances.
The L-Mount Assembly is the version specifically engineered for the alkaline-battery 3421 laser, which runs 8+ hours of all-day operation on 4 AA alkaline batteries and delivers a high-intensity green laser beam (4X brighter than competing red lasers) visible across the 100 ft. working range or 165 ft. with a laser line detector. A bent, broken, cracked, or missing L-Mount Assembly prevents proper laser mounting, makes magnetic attachment unreliable, and can affect the laser's leveling accuracy if the mount is no longer geometrically true to the laser's reference axes. Replacing the assembly with this OEM service part restores correct mounting integrity and reliable laser positioning. Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, always verify your tool's serial number against the official Milwaukee 3421 service parts diagram before ordering. The 31-10-0023 is the L-Mount Assembly specifically for the alkaline-powered 3421 platform. Verify by serial number using Milwaukee's online parts lookup before ordering to confirm correct fitment.
Features
- Genuine Milwaukee OEM replacement, direct factory part for the 31-10-0023 reference
- L-shaped mounting bracket assembly for the Milwaukee 3421 Green Cross Line Laser
- Designed specifically for the alkaline-powered 3421 laser platform
- Provides mounting interface for laser tripods using 1/4-20 thread mount
- Compatible with screw and nail hang holes for wall and surface mounting
- Works with the laser's integrated Rare Earth magnets for metal surface mounting
- Critical for stable, drift-free layout work across the 3421's 100 ft. range (165 ft. with detector)
- Maintains correct geometric reference to the laser's leveling axes
- Manufactured to Milwaukee factory tolerances and material specifications
- Direct-fit replacement, no modification required for installation
- Restores correct mounting integrity after bending, cracking, breakage, or loss of the original
- Compatible with all current Milwaukee laser accessories that work with the 3421
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 31-10-0023
- Official Description: Alkaline L-Mount Assembly
- Component Type: Laser L-Mount Bracket Assembly
- Primary Fitment: Milwaukee 3421 Green Cross Line Laser (alkaline-powered)
- Tool Power Source: 4 AA alkaline batteries
- Tool Working Range: 100 ft. visible, 165 ft. with laser line detector
- Tool Accuracy: +/- 1/8 in. at 33 ft.
- Tool Self-Leveling: +/- 4 degree tilt
- Compatible Tripod Thread: 1/4-20
- Tool IP Rating: IP54 (water and dust resistant)
- Quantity: Sold individually, 1 L-Mount Assembly per order
- Part Type: OEM Service Replacement Assembly
Includes
- (1) Milwaukee 31-10-0023 Alkaline L-Mount Assembly
- Note: This L-Mount Assembly is specifically for the alkaline-powered Milwaukee 3421 Green Cross Line Laser. Verify your laser's catalog number (3421) matches before ordering, since L-Mount assemblies for other Milwaukee laser platforms are NOT interchangeable
- Note: Verify your tool's catalog number (3421) and serial number against the official Milwaukee parts diagram before ordering
