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PDQ MR174 BFEF Privacy with Thumbturn on Both Sides Function Mortise Lockset - Grade 1
The PDQ MR174 BSN (often ordered as BFEF for the Boston lever on a forged F-Series escutcheon) is a premier Grade 1 Privacy with Thumbturn on Both Sides 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, dressing rooms, and private offices where the door can be locked or unlocked by a thumbturn on either side.
Constructed with a heavy-duty 12-gauge cold rolled steel mechanism, the MR174 provides a formidable defense against unauthorized entry. The Boston (BSN) 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.
Function: Privacy with Thumbturn on Both Sides
The Privacy with Thumbturn on Both Sides function operates the latchbolt from either side and lets the outside lever be locked or unlocked by a thumbturn on either side:
- Latchbolt operated by lever from either side.
- Thumbturn outside locks/unlocks outside lever.
- Thumbturn inside locks/unlocks outside lever.
- Closing door unlocks outside lever.
- Rotating inside lever unlocks outside lever.
Technical Specifications
| Feature | Details |
| Model | PDQ MR174 BSN (F-Series Escutcheon) |
| ANSI Function | -- (Privacy with Thumbturn on Both Sides; no ANSI code) |
| Performance | 11 Million+ Cycles (11x Grade 1 Standard) |
| Chassis Case | 12-Gauge Cold Rolled Steel (Dichromated) |
| Lever Style | Boston (BSN) - Forged Brass Base |
| 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 Boston 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.
| 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 | Privacy with Thumbturn on Both Sides |
| Trim Design | BFEF |
| Series | PDQ - MR Series |
| Strike Type | 4-7/8 ANSI Strike - Hollow Metal Frames |
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