Tom from SWISCO responded:
July 21, 2017
Hey there! Thanks for contacting us. Please check out our 26-243 and 26-244 tilt latches and compare our measurements to yours. We suggest the 15-199 pivot shoe, which implies a Series 165 coil balance and 15-205 cover. Series 165 is 3/8" thick. The number on the old coil spring will help you select the strength option.
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