Transcription: A fit describes the way two or more parts come together. There are three main types of fits. In a clearance fit, one part is always smaller than the other, so there is space between the two. In contrast, for an interference fit, the inner part is larger than the outer one. The minimum clearance or maximum interference between the two parts is called the allowance. When the allowance is equal to zero, the part sizes match exactly and a line-to-line fit is produced.
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