Replacement dual window locks - for an inside shower window

A handy person from White Plains, NY says:
Can you please tell me the replacement sash locks and associated hardware (screws) to replace these dual locks for a full sized window (30" x 53 1/2") that is inside of a shower. The dual sash locks and hardware have to be able to withstand water. The pictures are attached w/ a ruler for scale - the width of the locks is 2 5/8".
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Jasmine from SWISCO responded:

Hey there,

Thanks for posting! Your sweep lock looks a lot like our 90-180 Window Sash Lock, this is often used with the 90-183 Sash Lock Keeper. These parts are sold separately. 

It is generally recommended to reuse the existing screws since these parts are not sold with them. If they cannot be reused, it is suggested to take one of the existing screws to a local hardware store. They'll be able to confirm the exact screw you need.

To determine if this is the right fit for your sash, carefully compare the dimensions shown below.

Dimensions for 90-180
Dimensions for 90-180

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