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PDQ SX126 Grade 1 Passage Cylindrical Knob Lock
Grade 1 Heavy Duty Ball Knob Cylindrical Lock
The PDQ SX126 is the Passage function (ANSI/BHMA F75) of the PDQ SX Series Grade 1 Heavy Duty Ball Knob Cylindrical Lock.
The PDQ SX Series is a ball knob cylindrical lock that meets ANSI/BHMA A156.2 Grade 1 and is designed to withstand high-traffic environments. It fits standard 160 or 161 door prep, so it can be used to retrofit existing doors.
The SX uses a CQ ball knob in 630 satin stainless steel finish, is UL/cUL 10C listed for 3-hour fire doors on single doors up to 4'0" x 8'0", and is backed by a 5-year limited warranty.
Key Features
- Meets ANSI/BHMA A156.2 Grade 1
- CQ ball knob trim with 3" diameter wrought roses, 630 (US32D) finish
- Fits standard 160 or 161 door prep on 1-3/8" to 2" thick doors, 2-3/4" or 2-3/8" backset
- Steel case with yellow chromate plate
- UL F stainless steel latchbolt, qualified for 3 hours of fire testing
- Non-handed
- Keyed functions available in keyways of most major manufacturers, with small format IC core options
- UL/cUL 10C listed for 3 hours on single doors up to 4'0" x 8'0"; TAA compliant; five (5) year limited warranty
Technical Specifications
- Grade: Grade 1
- ANSI/BHMA Function: F75
- Lock Function: Passage
- Keyed Function: Non-Keyed
- Lock Type: Cylindrical
- Backset (Distance): 2-3/4"
- Door Hand Direction: Non-Handed
- Fire Rated: Yes
- Warranty: 5-year
- ANSI Standard: A156.2
- Fire Rating: UL/CUL 10C 3-hour, single doors up to 4' x 8'
- Door thickness: 1-3/8" to 2" thick
- Door prep: Fits standard 160 or 161 door prep
- 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 bronze
- Strike: 4-7/8" x 1-1/4" ASA standard; T or FL optional; stainless steel or wrought bronze
- Latchbolt: UL F latchbolt, 3 hours fire testing qualified, stainless steel
- Rose: 3" DIA wrought
- Hand: Non-handed
- Trim: CQ ball knob, stainless steel or wrought brass
- Keyways: Available in keyways of most major manufacturers
- Cylinder: Spec page: supplied standard to accommodate SFIC core (cylinder not included); standard high security cylinders available
- Keying: Standard core available MK, CMK, GMK or CK; zero bitted, keyed different, keyed alike; can be keyed into existing masterkey systems
- Default furnished: 2-3/4" latchbolt with 2-1/4" x 1-1/8" faceplate, ASA strike, SCC keyway unless otherwise stated
Available Options
- Finish: 630 - Satin Stainless Steel
- Knob Style: CQ Ball Knob
- Also selected when ordering: Backset, Strike, Dust Box
Certifications
- Meets ANSI/BHMA A156.2 Grade 1
- UL/CUL 10C listed for 3 hrs, for single doors up to 4'0" x 8'0"
- TAA compliant
Typical Applications
- Multifamily buildings
- Government facilities
- Commercial buildings
- Healthcare facilities
Frequently Asked Questions
Is the SX lock ADA compliant?
No. Its round ball knob trim does not meet ADA/ICC A117.1 operable-parts requirements, which call for hardware operable without tight grasping or twisting. The SX should be specified only where knob hardware is code-permitted.
What is the difference between the SX and PDQ's GT and XGT locks?
The SX is also Grade 1, but it uses a CQ ball knob rather than a lever and carries a 5-year limited warranty. It is a lower-cost Grade 1 option where lever trim is not required.
Can the SX retrofit an existing door?
Yes. The SX is built for standard 160 or 161 cylindrical lock prep with 2-3/8" or 2-3/4" backset options, so it fits most existing commercial door cutouts as a replacement for worn knob locks.
Manufacturer Resources
PDQ SX 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:
- SX126
- Commercial/Residential:
- Commercial
- Series:
- SX Series
- Grade:
- Grade 1
- ANSI/BHMA:
- F75
- Lock Function:
- Passage
- Keyed:
- No
- Electronic:
- No
- Door Hand Direction:
- Non-Handed
- Warranty:
- 5-year
- Tags:
- pdq sx126, sx126 pdq, sx126
- Subcategory:
- Cylindrical Locks
- Duty Level:
- Heavy Duty
- Product Attribute:
- Cylindrical Locks
- Lock Type:
- Cylindrical
- Handle Type:
- Knob
- Product Function:
- Passage
- Keyed Function:
- Non-Keyed
- Backset (Distance):
- 2-3/4"
- Standard Strike:
- 4-7/8" x 1-1/4" ASA standard
- Fire Rated:
- Yes
PDQ SX126CQ630 – Frequently Asked Questions
1) Will the PDQ SX126 fit an existing 161 door prep without new drilling?
Yes. The SX126 passage knob lock is built for standard 160 or 161 cylindrical prep, so it drops into most existing commercial door cutouts as a replacement for a worn knob lock. It fits doors 1-3/8 inch to 2 inch thick, and backset is chosen at order time: 2-3/4 inch standard or 2-3/8 inch optional. Measure from the door edge to the center of the existing bore to pick the right one.
2) Does the PDQ SX126 lock, or is it just a passage latch?
It does not lock. The SX126 is the Passage function (ANSI/BHMA F75) of the PDQ SX Series, meaning both knobs always retract the latch, with no key and no cylinder. It is non-keyed. For corridor, closet, or stairwell doors that need a latch but no security, that is the right function. If you need keyed control on the same door prep, order a keyed SX function instead, which accepts keyways of most major manufacturers including small format IC core.
3) Is the PDQ SX126 knob lock ADA compliant?
No. The round CQ ball knob trim does not meet ADA/ICC A117.1 operable-parts requirements, which call for hardware operable without tight grasping or twisting. Specify the SX126 only where knob hardware is code-permitted. For an accessible opening you need a lever trim lockset instead.
4) Do I have to pick a strike for the PDQ SX126, and which one matches my frame?
Strike is a required selection. The standard is the 4-7/8 x 1-1/4 inch ASA strike in 630 stainless, which matches ASA-prepped hollow metal frames. Two alternates are offered: an FL full lip strike at 1-5/8 x 2-1/4 inches and a T-strike at 1-1/8 x 2-3/4 inches, both 630 stainless. Use the T or FL when the frame has a smaller legacy cutout rather than full ASA prep. A dust box (DB) is also a required choice, and it is worth adding on hollow metal frames to keep debris out of the latch pocket.
5) Does the SX126 need to be ordered left or right hand?
No handing to specify. The SX126 is non-handed, so one lock works on either a left or right hand door and there is nothing to field-reverse. That makes it easy for a property manager stocking a few spares for a building.
6) Is the PDQ SX126 heavy duty enough for an apartment corridor or school hallway?
It meets ANSI/BHMA A156.2 Grade 1, the heavy duty commercial classification, and is built for high-traffic openings. Construction is a steel case with yellow chromate plating, stainless steel latchbolt, and 3 inch diameter wrought roses. Typical uses are multifamily, government, commercial, and healthcare buildings. It is also TAA compliant, which matters on federal work.
7) What is the difference between the PDQ SX knob lock and PDQ's GT lever locks?
Both are Grade 1 cylindrical locks. The SX uses a CQ ball knob rather than a lever, which keeps the cost down but rules it out where ADA lever trim is required. The GT and XGT lines give you lever trim. If the opening is a code-required accessible route, go lever; if knobs are permitted and you want Grade 1 durability, the SX126 is the passage version of that family.
8) What finish does the PDQ SX126 come in, and will it match other stainless hardware in the building?
One finish: 630 satin stainless steel, also called US32D, on the CQ ball knob and 3 inch wrought roses. The ASA, FL, and T strikes are all 630 as well, so the whole assembly matches. 630 is the standard commercial satin stainless finish, so it will sit alongside most existing exit devices, closers, and hinges specified in 630/US32D.
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Does the PDQ SX126CQ630 come with a warranty?
Absolutely. The PDQ SX126CQ630 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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