"31858" Casement window operator

Handy Person from Whidbey Island Washington

Apr 30, 2026 5:39 pm

The bar hinges have severaly corroded on on windows facing the beach and require replacements. Please provide the part number and I will submit my order, thanks.

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4 Replies

Tom from SWISCO

May 5, 2026 11:17 am

That number is often associated with our 39-253LB and 39-253RB operators, but you'll need to review their design and specs to verify that they match. It's difficult to make yours out from this underside view, as I can't see the whole thing. We also sell the 39-451 and 39-452 separately.

Handy Person from Whidbey Island Washington

May 5, 2026 12:18 pm

Its not the operators that need replacement, its the bar hinges which measure about 7'. Can you provide a part number for replacements?
thanks.

Tom from SWISCO

May 6, 2026 1:01 pm

Gotcha, sorry for the confusion. So for hinges, you want to measure the base track, not the arms. See our 36-048 for one possibility; this has a 10" base track. As long as that matches, and as long as you replace the top and bottom at the same time, then you should be good to go.