What do these drawer slide numbers mean?


From Accuride 3800 series full extension slides description:
Side space: .50" +0.062 / -0.0 [12.7mm +1.6 / -0.0]
I thought the side space of the slides is 1/2"? What does the rest of that line mean?
Cheers! Duke
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Dukes909 wrote:

possible width is .5625" and the minimum is .50"
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than 12.7mm
Tim w
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That is how much the distance can vary from the specification, and have the side still work.
in other words: you must have a minimum of 1/2" clearance for the slides *and* you can have a maximum of 9/16" clearance for the slides.
(the closer to 1/2" you are, without going _under_ 1/2", the better.)
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