Falcon A57420-000 B Series 2-3/8" Springlatch, 1" Face

Measure from the door edge to the center of the bore. The A57420-000 is cut for a 2-3/8 inch backset, which is the standard on most residential and light commercial doors. If your door measures 2-3/4 inches, this latch won't reach the spindle, and you need the 2-3/4 version instead. Those are the only two backsets used on cylindrical locks, so if it isn't one it's the other.

No, not on an outswing or exterior opening. A spring latch has a plain bevel and no auxiliary deadlocking plunger, so it can be loided with a card or shim when the door edge is reachable. Use it on passage, privacy and interior openings. For a keyed function on a secured door you want a dead latch instead, like the Hager 3948 dead latch, which Hager lists for all keyed functions on 2-3/8 inch backset.

The Falcon A57420-000 won't work on those openings, it's a 2-3/8 only. Hager's 3947 is a standard spring latch cut for a 2-3/4 inch backset with a square corner faceplate, passage function. If the lock chassis in your door is Falcon B Series, order the 2-3/4 inch version of the Falcon latch rather than crossing brands, since the latch tail has to engage that chassis.

The Falcon A57420-000 is a B Series springlatch with a 2-3/8 inch backset and a 1 inch face. The closest cross-brand match is the Hager 3945, a 3400 Series spring latch with a 2-3/8 inch backset in a passage function. Both are non-keyed spring latches at the same 2-3/8 inch backset, so the door bore-to-edge dimension is the same on either. Confirm the faceplate size and shape against what is already mortised into the door edge before swapping, since the Falcon carries a 1 inch face.

The Falcon A57420-000 is built to a 2-3/8 inch backset, so it will not reach the bore on a door prepped at 2-3/4 inch. For that opening, use the Hager 3947, a standard spring latch with a 2-3/4 inch backset and a square corner faceplate. Backset is measured from the door edge to the center of the bore, and it has to match the existing prep exactly - there is no adjustment between the two dimensions. Check whether your existing mortise is square corner or radius corner before ordering, since the 3947 carries a square corner faceplate.

No - they do different jobs even though both are 2-3/8 inch backset latches. The Falcon A57420-000 is a springlatch. The Hager 3948 is a dead latch for the 2500, 3500 and 3700 Series with a 2-3/8 inch backset, and it is built for all keyed functions. A dead latch adds a deadlocking plunger alongside the latchbolt so the bolt cannot be shimmed back when the door is closed, which is what a keyed lockset needs. If you are replacing a springlatch in a non-keyed opening, the dead latch is not the part - the Hager 3949 spring latch for the 2500, 3500 and 3700 Series is the passage-function counterpart at the same 2-3/8 inch backset.

Both are passage-function spring latches with a 2-3/8 inch backset, the same backset the Falcon A57420-000 B Series springlatch uses, but they are cut for different lock families. The Hager 3945 is a 3400 Series spring latch. The Hager 3949 is a spring latch for the 2500, 3500 and 3700 Series. If you are cross-referencing away from the Falcon B Series, identify which Hager lock body is on the door first - the latch has to match the chassis it retracts from, not just the backset dimension. Property managers standardizing a building on one latch should pick the one matching the lockset family already hung on the majority of the doors.

Three: 605 bright brass, 613 oil rubbed bronze, and 630 satin stainless. On a latch only the faceplate shows once the door is closed, so match it to the lockset's finish rather than to the strike if the two ever differed. 630 satin stainless is the usual commercial pick and pairs with 626 satin chrome trim closely enough that most facilities standardize on it.

Yes, it's a commercial door hardware part, built for the Falcon B Series cylindrical line rather than a residential knob set. For a property manager standardizing a building, that means one latch part number covers every B Series passage opening at 2-3/8 inch backset, and you can stock it as a repair item instead of replacing whole locksets when a latch fails.

The Falcon A57420-000 B Series springlatch is offered in 605 bright brass, 613 oil rubbed bronze, and 630 satin stainless. Finish only shows on the exposed faceplate at the door edge, so on a commercial opening where the lockset trim is already 626 or 630, the satin stainless 630 Falcon latch is the one that blends. When you are cross-referencing to a Hager 3945 or 3949, match on backset and lock family first and treat the faceplate finish as the last check, since a mismatched face is visible every time the door swings.