Window Hardware Direct | Parts Identification
Yes, you can often find a replacement window part without knowing who made the window. If the label is missing, start with the hardware you have. Where it sits, how it attaches, and what it measures can tell you more about the fit than a brand name alone.
Say the little thumb latch at the top of your bathroom window has cracked. You check the frame for a name. Nothing. Now you have a broken piece of plastic and no idea what to type into a search box. The useful clue is something you already know: you slide that latch with your thumb when you want to tilt the window in for cleaning.
Start with what the part does
In this example, the part is a tilt latch. It sits near an upper corner of the sash, the framed section that moves. Its tip catches in the side of the window frame and retracts when you slide the tab. That description distinguishes it from the lock you turn where the upper and lower sashes meet. Both might be white and sit along the same rail, but searching for a “white window lock” would send you down the wrong aisle.
Use the same approach even if your broken part looks nothing like a latch. “The handle I turn to open the kitchen window” gives someone helping you a better starting point than “hardware for an older window.”
Take one photo before you move anything
Step back far enough to show the latch, the corner of the sash, and the side of the frame. A closeup shows the crack. The wider shot tells you which side the part belongs on and which way its tip points. Note the side as you see it from inside the room.
Now look at how the latch attaches. Can you see a housing screwed onto the top of the sash? Or does the latch sit in a pocket with just the tab and top edge showing? That observation separates two groups of replacements that can look much alike from above. If the part is already out, photograph its underside as well. A ridge, clip, or molded number that was hidden in the window may be visible there.
Measure the features that decide the fit
Suppose yours is a surface mounted latch with two screws. You find two white replacements with a similar thumb tab. Start by comparing the screw holes: place zero on the center of one hole in the original latch and read the ruler at the center of the other. If a candidate has different spacing, its screws won’t line up with the existing holes.
If both candidates pass that check, compare the length and width of the housing, leaving the projecting tip out of the housing length. Then compare the tip itself: how far does it extend beyond the housing at rest, and which way does its angled edge face? A latch can screw into place yet have a tip that falls short of the frame. For a latch that slides into a pocket, compare the underside and the shape of the housing with the listing photos as well.
WHD’s illustrated tilt latch measuring guide shows where to place the ruler for each measurement.
When does the window brand still matter?
Sometimes the visible tab is only one piece of a mechanism concealed inside the sash. Two tabs can look alike while the parts beneath them attach differently. If the photos and measurements leave more than one possible match, this is where a manufacturer name or model number can help. Check an intact matching window for a surviving label, or look for the original order paperwork if you have it. A name molded into the hardware is worth photographing too, even if you aren’t sure whether it belongs to the window maker or the hardware supplier.