Split Arm Casement Window Operator 5” ARM ‘Ellipse Dyad’ (Truth Hardware 15.181.61) LEFT HAND


The 15 Series Operators have a high-pressure die-cast zinc housing that is electrostatically coated. The E-Gard coated gear arms and drive worm are made of hardened steel. The #15 Ellipse Dyad Operators are designed for windows from 16″ to 24″ wide up to 52″ high with a maximum sash weight of 52 lbs. when used with the proper 14 Series Casement Hinges.


Truth Split Arm Operator 30905

Common number found on this operator is 30905, which is found on the linkage arm, along with 45035 on the body, 40351 and 40352 on the arms. Also known as a TH-24174, TH-24175, TH-24176, and TH-24177. Replaces the TH-24018, TH-24019, TH-24020 and TH-24021.

Order stud bracket and handle separately if needed (see related products below). Any handle style will fit.

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The easiest way to determine the handing of your casement window unit is from the interior (inside) of the home. If you have multiple windows, stand in front of each window in question and locate the locks. The lock location will determine the handing of the unit.

All casement hardware, which includes locks, operators and hinges, are handed based on the lock location when viewed from the interior.


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