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PDQ SV125 Grade 2 Closet/Communicating Cylindrical Knob Lock
Grade 2 Standard Duty Ball Knob Cylindrical Lock
The PDQ SV125 is the Closet/Communicating function of the PDQ SV Series Grade 2 Standard Duty Ball Knob Cylindrical Lock.
The PDQ SV Series is an ANSI/BHMA A156.2 Grade 2 certified ball knob cylindrical lock for commercial applications. It fits standard 161 door prep on doors 1-3/8" to 1-3/4" thick, so it can be used to retrofit existing commercial doors.
The SV is offered in a range of keyed and non-keyed functions and keyway options, and is UL/cUL 10C listed for 3-hour fire doors on single doors up to 4'0" x 8'0".
Key Features
- ANSI/BHMA A156.2 Grade 2 certified
- Ball knob trim with stainless steel or wrought brass knobs and 3" diameter wrought roses
- Fits standard 161 door prep on 1-3/8" to 1-3/4" doors, 2-3/4" standard or 2-3/8" backset
- 1/2" throw solid brass latchbolt, adjustable for beveled doors
- Non-handed
- Keyed functions use a brass 6-pin cylinder keyed to 5 pins, with two change keys per lock and keyways of most major manufacturers
- UL/cUL 10C listed for 3-hour fire doors, single doors up to 4'0" x 8'0"
- TAA compliant; one (1) year limited warranty
Technical Specifications
- Grade: Grade 2
- Lock Function: Closet/Communicating
- Keyed Function: Non-Keyed
- Lock Type: Cylindrical
- Backset (Distance): 2-3/4"
- Door Hand Direction: Non-Handed
- Fire Rated: Yes
- Warranty: 1-year
- ANSI Standard: A156.2
- Fire Rating: UL/cUL 10C 3-hour, single doors up to 4'0" x 8'0"
- Door thickness: 1-3/8" to 1-3/4"
- Backset: 2-3/4" standard; 2-3/8" optional
- Front: 2-1/4" x 1-1/8" or 2-1/4" x 1"; stainless steel or wrought brass
- Strike: ASA 4-7/8" x 1-1/4" standard; T or Full Lip optional; stainless steel or wrought bronze
- Knob: Ball knob (CQ); stainless steel or wrought brass knobs and roses
- Rose: 3" diameter wrought
- Latchbolt: 1/2" throw, solid brass, adjustable for beveled doors
- Handing: Non-handed
- Keys: Two change keys per lock
- Keyway: SCC standard; keyways of most major manufacturers
- Cylinder: Brass 6-pin cylinder keyed to 5 pins; high security cylinders available
- Keying: MK, CMK, GMK, CK, KO, KD, KA; can be keyed into existing master key systems
- Manufacturer Part Number: SV125
Available Options
- Finish: 605 - Bright Brass, 613E - Dark Oxidized Satin Bronze, 630 - Satin Stainless Steel
- Knob Style: Ball Knob
- Also selected when ordering: Backset, Strike
Each configuration has its own PDQ part number, for example SV125CQ605.
Certifications
- ANSI/BHMA A156.2 Grade 2
- UL/cUL 10C 3 hrs single doors up to 4'0" x 8'0"
- TAA compliant, country of origin KR
Typical Applications
- Commercial doors
- Retrofit of existing commercial doors with 161 door prep
Frequently Asked Questions
Is the SV knob lock ADA compliant?
No. Its round ball knob design does not meet ADA/ICC A117.1 operable-parts requirements for hardware usable without tight grasping or twisting, so it should be limited to applications where knob hardware is code-permitted.
What is the difference between the SV and the SX?
Both are PDQ ball knob cylindrical locks. The SV is Grade 2 certified and is the lower-traffic option, while the SX is Grade 1 for high-traffic doors.
What door prep does the SV fit?
The SV fits standard 161 door prep on doors 1-3/8" to 1-3/4" thick with a 2-3/4" or 2-3/8" backset, which makes it a straightforward retrofit for existing knob locksets.
Manufacturer Resources
PDQ SV Series Architectural Submittal Sheet
Product Specs
- Department:
- Door Hardware
- Product Group:
- Mechanical Locks
- Product Subgroup:
- Bored Locksets
- Product Type:
- Leverset
- Product Category:
- Mechanical Locks
- Product Model:
- SV125
- Commercial/Residential:
- Commercial
- Series:
- SV Series
- Grade:
- Grade 2
- Lock Function:
- Closet/Communicating
- Keyed:
- No
- Electronic:
- No
- Door Hand Direction:
- Non-Handed
- Warranty:
- 1-year
- Tags:
- pdq sv125, sv125 pdq, sv125
- Subcategory:
- Cylindrical Locks
- Duty Level:
- Standard Duty
- Product Attribute:
- Cylindrical Locks
- Lock Type:
- Cylindrical
- Handle Type:
- Knob
- Product Function:
- Closet/Communicating
- Keyed Function:
- Non-Keyed
- Backset (Distance):
- 2-3/4"
- Standard Latch:
- 1/2" Throw
- Standard Strike:
- ASA 4-7/8" x 1-1/4" standard
- Fire Rated:
- Yes
PDQ SV125CQ630 – Frequently Asked Questions
1) What does the Closet/Communicating function on the PDQ SV125 knob lock actually do?
The SV125 is the non-keyed Closet/Communicating function of PDQ's SV Series ball knob cylindrical lock. There's no cylinder and no key: both knobs always retract the latch, so the door latches shut but never locks. It's the function you want on closets, storage rooms, and a door between two rooms where you only need the latch to hold it closed.
2) Will the PDQ SV125 fit the existing knob lock prep on my commercial doors?
Yes, if the doors carry standard 161 prep. The SV125 fits 161 door prep on doors 1-3/8 inch to 1-3/4 inch thick, with a 2-3/4 inch backset standard and 2-3/8 inch available, so it drops into most existing commercial knob lockset openings without new boring. The latchbolt is a 1/2 inch throw solid brass unit that's adjustable for beveled doors.
3) Can I use the PDQ SV125 knob lock on a door that has to meet ADA?
No. The round ball knob requires grasping and twisting, which does not satisfy ADA/ICC A117.1 operable-parts requirements. Use it only where knob hardware is code-permitted, such as closet and storage doors that fall outside the accessible-route requirement. For an accessible opening you need a lever handle instead.
4) Can the PDQ SV125 be keyed into our building master key system?
No. The SV125 is the non-keyed Closet/Communicating function, so there is no cylinder in it and nothing to key. If you need this opening on your master key system, order a keyed SV Series function instead. Keyed SV functions use a brass 6-pin cylinder keyed to 5 pins, ship with two change keys, come in keyways of most major manufacturers, and can be keyed into an existing master key system.
5) Do I need to order the PDQ SV125 left hand or right hand?
Neither. The SV125 is non-handed, and the solid brass latchbolt is adjustable for beveled doors, so one lock covers any swing. Handing is not part of the order.
6) Which strike should I pick for the PDQ SV125 if I'm replacing hardware in an existing hollow metal frame?
Match the cutout you already have. Hollow metal frames are usually prepped for the ASA strike, 4-7/8 x 1-1/4 inch, which is the SV125 standard. Wood frames mortised for a smaller plate generally take the T-strike at 1-1/8 x 2-3/4 inch, and the full lip strike at 1-5/8 x 2-1/4 inch is the option when you need a longer lip to cover the frame edge.
7) Will the PDQ SV125 knobs match the other PDQ knob locks already on my building's doors?
The trim is the CQ ball knob with a 3 inch diameter wrought rose, in stainless steel or wrought brass depending on finish. Order it in 605 Bright Brass, 613E Dark Oxidized Satin Bronze, or 630 Satin Stainless Steel to match the SV and SX knobs already installed. It's the same trim family across the series, so a closet door in SV125 reads the same as a keyed SV opening down the hall.
How fast can I get the PDQ SV125CQ630 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
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Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the PDQ SV125CQ630 come with a warranty?
Absolutely. The PDQ SV125CQ630 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the PDQ SV125CQ630?
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