Truth 31858? Casement operator
Home Owner from Washington State
Aug 10, 2025 1:19 pm
Need help identifying replacement casement operators. Only number I could find is Truth 31858. I have attached photos of operator removed and operator currently installed on similar window. As shown in the photo, the "long" arm measures approximately 10"and the short arm approximately 4 7/8". There are 8 mounting holes. Both the long arm and short arm just snap in--no clips. Any help would be appreciated.
2 user uploaded images
4 Replies
Bob from SWISCO
Aug 10, 2025 6:36 pm
Thanks for posting. Looks like you might have either the 39-253LB and 39-253RB, or the 39-438B and 39-439B. The only difference between these two operator types is explained in the video below. For new covers and handles, see either the 39-375 and 39-376, or the 39-451 and 39-452, depending on the style preferred.
Quick Learner from Waterloo, Iowa
Aug 28, 2025 10:12 pm
Want to verify operator replacement. Has number 38158 stamped on one arm. Also Truth stamped on one arm.
5 user uploaded images
Bob from SWISCO
Aug 30, 2025 3:16 pm
Hello there. This looks like either the 39-253EB or 39-439B. The difference between these two operators is the appendage at the end of the straight arm, as shown in the video posted above. Take a look and see what matches best.
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