15-046 does not lock tight in window track

Question

I replaced two spiral balances and two pivot shoes. I very carefully measured the original pivot shoe and ordered replacement 15-046 Pivot-Shoe-1_2-inch-Thick/pd/Tilt-Window-Replacement-Pivot-Lock-Shoes/15-046. When in place and turned to lock position it firms up but can still be moved with some pressure on it. Original locked tight and wouldn't budge.

Questions:

Despite my careful measurements and the fact that looks identical, can I assume I got the wrong size if it wont lock tight?

and

Even though it doesn't lock tight the window works fine. Should that be the case?

Many thanks!

Paul · Accepted Answer

Thanks for posting! If you have the window working, I would leave it alone. However if you run into any problems in the future, or for the next time you replace this hardware, you might want to consider a 9/16 thick pivot shoe like our 15-118. The widow track might have spread over the years through use and age, which would cause the shoe to slip a little when in the locked position.