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Office Chair Backrest Jacket Hanger Clamp
This screw clamp fits over the top of an office chair backrest 10–55 mm thick and holds a length of 1/2 in Schedule 40 PVC (21.3 mm OD), which works as a coat-hanger shoulder bar so a jacket keeps its shape instead of bunching over the chair back. A captive M5 nut and an M5 x 50–60 mm bolt grip the backrest. The part is printed flat at 79 x 100 x 20 mm, so the jacket's weight runs along the layers and not across them.
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