Corbin Russwin ML2010 NSM Passage or Closet Mortise Lock, NS Lever, M Escutcheon

The Corbin Russwin ML2010 NSM is the passage function in the ML2000 Series configured with the Newport (NS) lever and the M escutcheon trim. The difference between this configuration and the ML2010 NSA is the trim plate: the A configuration uses a small round rose, while the NSM uses the larger M escutcheon, a rectangular or elongated trim plate that provides more surface coverage on the door face and a more substantial visual presence at the opening. On doors where the lock prep area needs to be covered more completely, or where the design specification calls for a larger trim footprint to match adjacent hardware, the M escutcheon is the correct selection.

Function remains ANSI F01 in both configurations: both levers always free, no cylinder, no locking mechanism. The latch bolt retracts when either lever is turned from either side at all times. For the complete ML2000 Series function lineup, browse Corbin Russwin ML2000 Series. For all commercial mortise locks across every brand, view our commercial mortise locks catalog.

A Rose vs. M Escutcheon: Choosing the Right Trim

This is one of the most common questions when specifying ML2000 Series locks. The A rose is a compact round trim plate that gives a minimal, clean appearance on the door face. It's suited for modern interiors where a smaller hardware footprint is preferred. The M escutcheon is a larger, elongated trim plate that covers more of the door surface around the spindle and cylinder prep area. It suits traditional and institutional interiors where a more formal hardware appearance is part of the specification, and it provides additional surface coverage that can conceal door prep imperfections on retrofit installations.

Neither choice affects function, certifications, or mechanical performance. Both are thru-bolted for proper alignment and security. The choice is based entirely on aesthetic requirements and trim size preferences from the architect or specifier.

Corbin Russwin ML2010 NSM Technical Specifications

Series: ML2000. ANSI function: F01, Passage or Closet. ANSI/BHMA standard: A156.13, Series 1000, Grade 1. UL Listed: yes, UL10C compliant, fire doors up to 3-hour rating. ULC Listed: yes. ADA Compliant: yes. Florida Building Code Windstorm Certified: yes. ASTM E330 Certified: yes. CAL FIRE approved: 3775-1305:0130. Buy American Act qualified. Lever: Newport (NS). Trim: M escutcheon. Handing: field reversible. Latchbolt throw: 3/4". Backset: standard 2-3/4" (minimum 2-3/8"). Door thickness: standard 1-3/4" (range 1-3/8" to 4"). Door types: wood, hollow metal, bullet-resistant. Strike: ANSI straight lip standard. Cylinder: none on passage function. Multi-function lockbody: yes, accepts all 63 ML2000 functions. Warranty: 10-year limited.

Why Specify ML2000 on a Passage Opening

A Grade 2 cylindrical passage lever is less expensive than an ML2000 mortise lock. The ML2010 gets specified on passage openings for two reasons. First, consistency: when the rest of the building runs ML2000 Series mortise locks, specifying the same lock body on passage doors maintains uniform door prep, trim style, and finish coordination across the entire door schedule. Second, flexibility: the ML2000 multi-function lockbody accepts all 63 available functions without changing the mortise case in the door. If a passage opening later needs to be upgraded to entrance, classroom, or storeroom, only the trim changes. The lockbody stays, saving labor and hardware costs on future modifications.

Patented Quick Reversible Latchbolt

The ML2000 lockbody features Corbin Russwin's patented Quick Reversible latchbolt. Handing can be changed in the field without removing or disassembling the lock case from the door. No specialist tools required beyond standard installation hardware already on site.

Available Finishes

605 Bright Brass, 606 Satin Brass, 612 Satin Bronze, 613 Dark Bronze, 619 Satin Nickel, 625 Bright Chrome, 626 Satin Chrome, 629 Bright Stainless Steel, 630 Satin Stainless Steel, 633 Aged Bronze, 643 Matte Black, 689 Aluminum, 690 Dark Aluminum, 693 Black, 695 Satin Nickel Plated Steel.

For other trim combinations on the ML2010 passage function including the A rose style, browse Corbin Russwin lever locks for related configurations.