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crushers 28 coarse and fine metal

For US Fasteners you might see 1420 and 1428 To determine which of these is coarse thread and which is fine simply take the TPI number the 20 and the 28 and compare Remember a coarse thread means the threads are bigger so less will be able to fit within an inch so the 20 means the fastener is coarse thread and the 28 means the

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