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8-32 — the standard US cabinet knob and pull thread
M4 x 0.7 — the standard European / imported cabinet thread
10-24 — occasional heavy commercial pulls
What it fits
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Common mistakes
8-32 and M4 are close enough to start by hand and then bind — if it feels gritty after two turns, back it out. Thicker doors or added backplates need longer screws; buy an assortment in 1/2" steps.
Adjustable/break-away cabinet screws let you snap them to length.
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