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PDQ MR178 MFEF Privacy with Deadbolt Function Mortise Lockset - Grade 1
The PDQ MR178 MIA (often ordered as MFEF for the Miami lever on a forged F-Series escutcheon) is a premier Grade 1 Privacy with Deadbolt Function Mortise Lockset engineered for demanding commercial environments. While typical commercial locks are rated for one million cycles, the PDQ MR Series is tested to over 11 million cycles -- extending the hardware lifespan by 11 times the industry standard. This lockset is designed for restrooms and private rooms that require a deadbolt, with an emergency coin-turn release on the outside for safety.
Constructed with a heavy-duty 12-gauge cold rolled steel mechanism and a 1-inch throw investment cast stainless steel deadbolt, the MR178 provides a formidable defense against unauthorized entry. The Miami (MIA) lever offers a clean, architectural aesthetic in a US26D Satin Chrome finish. Its "return-to-door" design is not only ADA compliant but also serves as a safety solution by preventing clothing, bags, or straps from snagging on the hardware in busy corridors.
ANSI Function F02: Privacy with Deadbolt
The Privacy with Deadbolt function operates the latchbolt from either side and adds a deadbolt controlled by an interior thumbturn, with an emergency coin-turn release on the outside:
- Latchbolt operated by lever from either side.
- Emergency coin turn outside retracts deadbolt.
- Thumbturn inside extends/retracts deadbolt.
- Not field reversible.
- Specify handing.
Technical Specifications
| Feature | Details |
| Model | PDQ MR178 MIA (F-Series Escutcheon) |
| ANSI Function | F02 (Privacy with Deadbolt) |
| Performance | 11 Million+ Cycles (11x Grade 1 Standard) |
| Chassis Case | 12-Gauge Cold Rolled Steel (Dichromated) |
| Lever Style | Miami (MIA) - Forged Brass Base |
| Deadbolt | 1" Throw Investment Cast Stainless Steel |
| Latchbolt | 3/4" Throw Stainless Steel, Anti-friction |
| Handing | Not Field Reversible -- specify LH (LHR) or RH (RHR) when ordering |
| Certifications | UL10C 3-Hour Fire Rated; HVHZ Hurricane Approved |
| Warranty | Lifetime Limited Warranty |
Engineered Solutions for Commercial Security
The PDQ MR Series addresses the specific technical and safety challenges of modern facilities:
- Vandal-Resistant Spindle: The "weakened spindle" design is a critical security solution. If the exterior lever is subjected to extreme torque or a hammer attack, the spindle breaks cleanly to prevent damage to the internal 12-gauge steel case, keeping the lock secure.
- Extreme Weather Durability: Certified for High Velocity Hurricane Zones (HVHZ) with a design load rating of +/- 70.0 PSF, this lockset provides the structural integrity necessary for coastal buildings.
- Anti-Sag Lever Technology: The MR Series utilizes independent, high-tension spring cartridges to ensure the Miami lever remains perfectly level throughout its multi-million cycle life.
- Fire Safety Compliance: With a UL 3-hour fire rating, this lockset ensures that commercial doors remain a reliable fire and smoke barrier, protecting occupants and property.
Handing: This mortise lockset is Not Field Reversible. Specify the door hand when ordering -- LH (LHR) or RH (RHR). Refer to the diagram above to determine the hand of your door.
| Finish with BHMA code | 626 - US26D Satin Chrome or 630 - US32D Satin Stainless or 613E - US10BE Oil Rubbed Bronze Equal or 605 - US3 Polish Brass or 606 - US4 Satin Brass or 612 - US10 Satin Bronze or 622 - US19 Flat Black or 629 - US32 Polish Stainless |
| Door Handing | LH or RH |
| Brand | PDQ |
| ANSI Mortise Lock Function | F02 - Privacy with Deadbolt |
| Trim Design | MFEF |
| Series | PDQ - MR Series |
| Strike Type | 4-7/8 ANSI Strike - Hollow Metal Frames |
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