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PDQ MR174 OJSJ Grade 1 Privacy with Thumbturn on Both Sides Function Mortise Lock - Heavy Duty
The PDQ MR174 OJSJ is an architectural-grade, Grade 1 Privacy with Thumbturn on Both Sides Function Mortise Lock for high-traffic commercial environments. It pairs the Orlando (OJ) lever -- a straight lever with a simple rounded end -- on a J-Series Sectional (round rose) in a US32D (630) Satin Stainless finish, and is engineered to exceed the rigorous standards of BHMA Series 1000. It suits rooms that need privacy control from either side, where a thumbturn on the inside or the outside locks the outside lever. Its "return-to-door" design is ADA compliant and helps prevent clothing, bags, or straps from snagging on the hardware in busy corridors.
Built to withstand punishing institutional use, the MR Series uses a heavy-duty forged brass and stainless steel internal mechanism inside a deep mortise cassette -- providing significantly higher forced-entry protection than standard cylindrical locks, the industry standard for schools, hospitals, and government offices.
Function: Privacy with Thumbturn on Both Sides
The Privacy function operates the latchbolt from either lever and locks the outside lever by a thumbturn on either side; closing the door or rotating the inside lever unlocks it:
- 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 OJSJ (J-Series Sectional (round rose)) |
| ANSI Function | -- (Privacy with Thumbturn on Both Sides; ANSI code not printed for this MR row) |
| ANSI/BHMA Grade | Grade 1 (Exceeds 1,000,000 Cycles) |
| Lever Design | Orlando (OJ) |
| Trim / Mounting | J-Series Sectional (round rose) (round rose) |
| Base Finish | US32D (630) Satin Stainless -- 626 not offered (J-Series) |
| Chassis | Heavy Gauge Steel, Zinc Dichromate Plated |
| Latch Bolt | 3/4" Throw, Stainless Steel, Anti-Friction |
| Privacy Release | Thumbturn on Both Sides (Inside and Outside) |
| Door Thickness | 1-3/4" Standard |
| Handing | Field Reversible (non-handed) |
| Warranty | Lifetime Limited Warranty |
High-Performance Solutions for Building Security
The PDQ MR Series Mortise Lock addresses the most demanding commercial infrastructure challenges:
- Maximum Forced Entry Resistance: The steel cassette fits deep into the door pocket, providing superior resistance against "kick-in" attacks and physical tampering versus single-point cylindrical locks.
- Two-Sided Privacy: A thumbturn on either side locks or unlocks the outside lever; closing the door or rotating the inside lever releases it.
- Anti-Sag Lever Technology: The Orlando lever is supported by an independent, high-tension spring cartridge that returns the handle to a level horizontal position every time.
- Vandal-Resistant Engineering: The trim features a break-away spindle design; extreme torque or a hammer attack breaks the spindle without compromising the internal locking mechanism.
- Architectural Integration: The Satin Stainless (US32D) base finish offers a clean, professional appearance and excellent corrosion resistance; premium finishes (605, 606, 612, 613E, 622, 629) are also available.
Finish availability: This J-Series lockset is offered in 630 (US32D Satin Stainless) as the base finish, plus premium architectural finishes 605, 606, 612, 613E, 622, 629. It is not offered in 626 (626 is an F-Series finish).
| Finish with BHMA code | 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 |
| Rose / Escutcheon Style | Round Rose - SJ or Square Rose - SR |
| Brand | PDQ |
| ANSI Mortise Lock Function | Privacy with Thumbturn on Both Sides |
| Trim Design | OJSJ |
| Series | PDQ - MR Series |
| Strike Type | 4-7/8 ANSI Strike - Hollow Metal Frames |
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