Captive Panel Retainers Installation Guide
Review the below information to properly install various captive panel retainers, including knurled shank retainers, panel screw retainers, and press fit retainers of either style.
![](https://mwi.imgix.net/Product-Images/MW-Components-Round-Head-Captive-wSelf-Sealing-Washer-and-Retainer-ASM.jpg?auto=format%2Ccompress&crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&ixlib=php-3.3.1&w=1280&s=adaba91ef77202a12750d188a5510cd2)
Knurled Shank Retainers – Press Fit Only
American Standard Sizes: All Dimensions are in Inches
SHANK DIA. “B” | .198 | .228 | .280 | .366 | .414 | .479 |
“X” DIA. | .188 | .218 | .270 | .356 | .404 | .469 |
![](https://mwi.imgix.net/Products/panel-retainer-illustration-with-Extra-Padding.jpg?auto=format%2Ccompress&crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&ixlib=php-3.3.1&w=1280&s=c6316755993fb7f2d347f15c3eab2cb1)
Panel Screw Retainers – Non Press Fit Styles Only
American Standard Sizes: All Dimensions are in Inches:
SHANK DIA. “B” | .188 | .218 | .250 | .270 | .356 | .404 | .406 | .433 |
“X” DIA. | .191 | .221 | .257 | .272 | .359 | .407 | .407 | .437 |
“Y” DIA. | .252 | .282 | .318 | .333 | .420 | .468 | .468 | .498 |
Rule of thumb for “Y” countersink: Y = X + .045 min. or 0.78 max
![](https://mwi.imgix.net/Products/knurled-retainer2-illustration-with-Extra-Padding.jpg?auto=format%2Ccompress&crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&ixlib=php-3.3.1&w=1280&s=ae4c420241e37b41fc6227924ddf76ab)
Knurled Shank Retainers – Press Fit Only
Metric Sizes: All Dimensions are in Millimeters
SHANK DIA. “B” | 5 | 5.8 | 7.1 | 9.3 |
“X” DIA. | 4.75 | 5.54 | 6.86 | 9.04 |
![](https://mwi.imgix.net/Products/panel-retainer-illustration-with-Extra-Padding.jpg?auto=format%2Ccompress&crop=focalpoint&fit=crop&fp-x=0.5&fp-y=0.5&ixlib=php-3.3.1&w=1280&s=c6316755993fb7f2d347f15c3eab2cb1)
Panel Screw Retainers – Non Press Fit Styles Only
Metric Sizes: All Dimensions are in Millimeters
SHANK DIA. “B” | 6.3 | 11 |
“X” DIA. | 6.5 | 11.2 |
“Y” DIA. | 8 | 12.6 |
Rule of thumb for “Y” countersink: Y = X + 1.14 min. or 1.98 max