by Small Parts
Buy new: $13.81
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A square-hole sleeve is a round sleeve with a perfectly square hole broached end to end through the center. They are made accurately and uniformly in large production runs, and are much less expensive than making your own squared holes. They are supplied in five convenient sizes of mild machine steel, concentric and square to 0.003" T.I.R. Two styles are available, one with a tapped hole at one end to receive the back-up set-screw sleeve (supplied), the other without.


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