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PDQ MR158 MFSF Dormitory Function Mortise Lockset - Grade 1
The PDQ MR158 MIA (often ordered as MFSF for the Miami lever on an F-Series Sectional (round rose, wrought trim)) is a premier Grade 1 Dormitory 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 suits dormitory and residential openings, pairing a toggle-lockable exterior lever with a keyed deadbolt and single-motion egress.
Constructed with a heavy-duty 12-gauge cold rolled steel mechanism and a 1-inch throw investment cast stainless steel deadbolt, the MR158 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 F11: Dormitory
The Dormitory function combines a toggle-lockable outside lever with a deadbolt keyed from both sides and single-motion interior egress:
- Latchbolt operated by lever from either side.
- Toggle locks/unlocks outside lever.
- Key outside extends/retracts deadbolt.
- Key inside extends/retracts deadbolt.
- Inside lever simultaneously retracts latchbolt and deadbolt.
- Auxiliary latch deadlocks latchbolt.
Technical Specifications
| Feature | Details |
| Model | PDQ MR158 MIA (F-Series Sectional) |
| ANSI Function | F11 (Dormitory) |
| 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 | Field Reversible (Specify for Strike) |
| 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.
- Simplified Key Management: Provided with a Schlage C (SCC) compatible cylinder, the MR158 integrates easily into existing master key systems. It also supports Interchangeable Core (IC) options for rapid re-keying.
- 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.
| 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 |
| Brand | PDQ |
| ANSI Mortise Lock Function | F11 - Dormitory |
| Trim Design | MFSF |
| Series | PDQ - MR Series |
| Strike Type | 4-7/8 ANSI Strike - Hollow Metal Frames |
| Standard Cylinders and Keyways | Schlage C Keyway |
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