Recently, I've had to identify a residential spring hinge for replacement. The owner doesn't like the finish and now this 15 year old hinge was starting to pit and tarnish. I thought I'd share with you my easy button.
1st of all here is what needed to be identified - It is a Bommer Spring Hinge 4" x 4" with 5/8" radius corners. It a little deceptive that looks "standard". But these screw holes are not the standard residential hinge screw hole pattern.
This was my first picture, without any adjustments.
For my second picture - I took a straight on shot and then rotated it 90 degrees in my computer software.
Finding and comparing the centerline of screw holes is the key to identify the hinge.
The biggest problem is locating the centerlines in this pictures. So I opened my picture in Paint program.....
And here is my Easy Button....
Once I pressed the magnifying button a rectangle appeared on my screen, and as long as I didn't click anything, I could line up the center of the centers of the screws with the tape measurer in the shot.
After knowing this is a Bommer Spring Hinge, I found out they have 4 different possibilities for the hinge replacement depending on the manufacturer of the door and each have different centerlines of the screw holes.
This hinge is a proprietary hinge. It is used on Pease Doors.
Boiling all the supper sleuthing down... This is a Bommer LB4340 4 x 4 hinge
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