What This Article Covers
A Grade 2 passage knob latch is one of the most routine items in a commercial hardware schedule: no locking function, no cylinder, no access control integration. It retracts a latchbolt when either knob is turned and holds a door closed without restricting passage. For facility managers, contractors, and hardware specifiers, that simplicity is the appeal. But routine products carry a quiet risk that catches projects at the wrong moment: finish availability is not uniform across the catalog, and a single non-stock finish on a passage latch can delay a hardware closeout by three to four weeks.
This article explains where that delay comes from, which applications it affects most, and how specifying or procuring finish choices early prevents a last-minute scheduling problem on otherwise straightforward openings.
What a Passage Knob Latch Actually Does
A passage latch (sometimes called a passage set or closet function) provides no locking capability on either side of the door. Both knobs rotate freely at all times, retracting the latchbolt to allow the door to swing open. The latch holds the door in the closed position against the strike but can be retracted by anyone turning either knob.
This makes passage latches the correct choice for:
- Hallway and corridor doors with no security requirement
- Mechanical room doors where egress must never be impeded
- Closet and storage room doors in offices and schools
- Interior suite entries where a separate access control device handles security
- Common-area restroom vestibule doors in retail and hospitality
In ANSI/BHMA terminology, this is an F01 function under A156.2. Because there is no cylinder, keying, or electrified component, the passage latch is among the lowest-complexity items on any hardware schedule. Complexity and lead time, however, are different problems.
Why Finish Is the Lead-Time Variable No One Tracks Early Enough
Commercial hardware distributors stock the most common finish for each product line. For passage knob latches, that finish is almost universally 626 satin chrome (US26D). It is the institutional standard: durable, cleanable, holds up in schools and healthcare corridors, and coordinates with the majority of other hardware on a typical commercial opening. When a project calls for 626, product is typically available and ships within one to two business days.
The problem starts when a finish other than satin chrome appears on the schedule. Brass-family finishes, specialty bronze tones, or even satin stainless can carry lead times of three to four weeks or longer, depending on the product line. That is not unusual for custom architectural hardware. What makes it a closeout problem is that passage latches are frequently treated as filler items in a hardware submittal, handled last because they are the simplest hardware type in the set.
How the Schedule Gets Built Wrong
Here is the sequence that creates the problem on real projects:
- The architect selects a finish family driven by the aesthetic of the primary entrance hardware: a warm satin brass or an oxidized bronze.
- The hardware schedule propagates that finish code to all hardware items, including passage latches throughout the building.
- The contractor submits and gets approval, then focuses procurement energy on high-complexity items: exit devices, electrified hardware, closers.
- Passage latches are ordered late because they are simple. The non-stock finish triggers a three-week factory order.
- Closeout is delayed on rooms that should have been ready weeks earlier.
This is especially common on school construction and healthcare renovation projects, where interior finish consistency is architecturally enforced but the operational urgency to close individual rooms or wings creates pressure that the late-arriving hardware cannot meet.
The ADA Dimension That Adds Another Layer
Round knobs are not permitted on doors serving accessible routes under ICC A117.1 and the ADA Accessibility Guidelines. Hardware on accessible routes must be operable with one hand without tight grasping, pinching, or twisting of the wrist. A round knob fails that standard.
This means passage knob latches are restricted to doors that are not on an accessible route. In practice, that includes many closet, storage, and mechanical room doors that are off the primary path of travel. But it is a determination that must be made at the specifying stage, not at punch list. If a passage knob latch is placed on a door that turns out to be on an accessible route, it requires replacement with a lever-function latch, which may carry its own lead time in the finish specified.
For industrial maintenance managers replacing hardware in existing facilities: verify the door's accessible route status before ordering a knob-function replacement. A Grade 2 passage lever latch in satin chrome is just as likely to be in stock and sidesteps the compliance issue entirely.
Grade 2 vs. Grade 1: Matching Duty to the Opening
BHMA/ANSI A156.2 grades locksets and latches by cycle testing and structural performance:
- Grade 1 is the heavy-commercial standard, required for high-frequency openings in schools, healthcare corridors, and high-traffic retail.
- Grade 2 is the commercial standard, appropriate for moderate-use interior openings: private offices, low-traffic storage rooms, interior suite doors.
A Grade 2 passage knob latch is correctly applied where the door sees moderate daily use and the opening is not on an accessible route. Over-specifying Grade 1 on a closet door costs money without operational benefit. Under-specifying Grade 2 on a door seeing heavy student or clinical traffic accelerates wear. The frequency-of-use decision deserves a moment on the schedule, not a blanket default.
Preferred lines from manufacturers such as Accentra (formerly Yale), Hager, Corbin Russwin, and PDQ offer Grade 2 passage latches across a range of finishes and are worth evaluating for availability and finish lead time at the time of procurement, not after submittals are approved.
Practical Steps to Avoid the Finish Lead-Time Trap
For Specifiers and Architects
- Flag any non-626 finish requirement on passage-function hardware early in the submittal process.
- Confirm stock availability with your distributor before the finish is locked into the schedule.
- Consider specifying 626 satin chrome as a match finish for interiors where the primary entrance hardware drives a different finish family, reserving the specialty finish for visible primary hardware only.
For Contractors and Commercial Subs
- Do not treat passage latches as last-order items when the project schedule calls for a non-stock finish.
- Pull lead times from your distributor on every finish code at the submittal stage, not at procurement.
- If a room must close before full hardware delivery, confirm whether a temporary latch in a stock finish is acceptable to the owner and authority having jurisdiction.
For Facility Managers Handling Replacements
- Stock a small quantity of satin chrome (626) passage knob latches in the maintenance inventory for non-accessible, low-traffic interior doors.
- Confirm the backset of the existing prep before ordering: most commercial doors use a 2-3/8 inch or 2-3/4 inch backset, and the wrong backset means a return trip.
- Use the manufacturer's template drawings to verify the door preparation matches the replacement unit before installation begins.
The Bottom Line
A Grade 2 passage knob latch is one of the simplest devices in commercial hardware. It has no locking mechanism, no cylinder, and no power requirement. But finish availability introduces a lead-time variable that project schedules routinely underestimate. Knowing which finish ships fast and which finish requires a factory order is information that belongs at the specifying and procurement stage, not at closeout. DoorwaysPlus carries passage latches from preferred lines in the most common commercial finishes and can advise on lead times before the order is placed.