Casement Window Operator (Crank Handle Mechanism) -
Handy Person from Toms River
Aug 26, 2025 8:57 am
White housing with foldable gray crank handle, used to open and close casement windows. Marked “MADE IN U.S.A.” with code 04.12.05 001:19.
Linkage Arms – steel arms attached to operator. Stamped with numbers:
41010B
31884
41016
Mounting Plate – Multiple screw holes for securing to window frame. Marked with casting code 50.12.10
5 user uploaded images
2 Replies
Emily from SWISCO
Sep 2, 2025 9:35 am
Hi there!
Thank you for reaching out to us. This resembles the 39-239B. The 39-239C is the stainless steel version. Review the specifications and see how they compare with your old assembly.
Please note that the 39-451 is sold separately.
Dimensions for 39-239B
Alternate view and dimensions for 39-239B
Alternate view and dimensions for 39-239B
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