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39-414 Vent Operator, 6" Arm

I need two of these operators - one left handed and the other right handed. the arm length is 6", the distance between screws is 3". No visible signs of brand name. This is the garden window in the house built in 1949

How do I install my new crank vent operator part 39-414 for my RV vent? It fits, just not sure how to install.

I need to put a longer handle on the newly installed 39-414 vent operator to clear the screen. What is the spline size?

Does the arm 39-414 open to 90 degrees?

Is this window crank available in 5.5" and 8" lengths? This is replacement for 1950's mobile home.

no markings, no nothing. gear on lifting arm is stripped. arm is one single piece that curves back with a gear on the end. threads on knob are okay. window is at top of garden window box.

Hello Could you please help me find the product.Thank you so much Tracy

I need someone to take a picture for me because I am not tech savvy. I had the crank repaired because they could not find the correct crank replacement online but they will not guarantee the repaired crank. The window was probably installed in the 1950's. I hope you have a replacement part. Do ... (cont.)

I purchased 39-414 vent operator for your bay window. My window is very heavy and the original operator was more substantial. This operator has stripped within a year. The original lasted 30 years. Is there a more heavy duty version I can purchase.

I have been unable to find this specific operator (Crank). I've been to my local hardware stores, ACE, Home Depot and Lowes with no luck. Your are my last hope. This crank goes into a Garden Windows (Top) opening.

this is for my kitchen greenhouse window. The window goes up and down.