The purpose of this page is to help you identify which Truth Entrygard Dual Arm Operator
you should order, in order to ensure everything goes back together properly. We find many
numbers on these operators, here are just a few of them, 31538, 31539, 30841, 30842,
30472, 30470, 20748, 20755, 20810, or 20544. The number that tells us the most is
the number that starts with a 2xxxx. This number is the Linkage Arm, that is attached
to the bracket on the hinge side of the window.
The picture below shows a Linkage Arm, it measures 3-3/4", is offset up and is used
on a Left Hand Operator.
The table below shows the linkage arm measurements and the number found on them.
| Linkage Length | Offset | Common Numbers | Model To Use |
| 2-7/8" | Up | 20748 | Wi1515 |
| 2-7/8" | Down | No Available | |
| 3-3/4" | Up | 20755 | Wi1516 |
| 3-3/4" | Down | 20755 on bottom | Wi1520 |
| 4-7/16" | Up | 20810 or 20544 | Wi1510 |
| 4-7/16" | Down | 20544 | Wi1561 |
Not sure if you have offset up or offset down, watch our instructional video.
If you have any doubts, do not worry. Call us or email a picture to
Sales@robertbrooke.com
Are you looking for commercial hardware? Robert Brooke and Associates specializes in commercial hardware for schools, universities, churches, YMCA, offices, businesses, warehouses and exhibit halls. Order your commercial hardware online by using this site, or call Robert Brooke and Associates for your commercial hardware specialties by phone at (800) 642-2403 weekday from 8AM—5PM Eastern Time. Robert Brooke and Associates ships commercial hardware in the United States, Canada and the world, and has been doing so since 1970. For the best price on commercial hardware with personal service and fast delivery times, call Robert Brooke and Associates
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