Three Key Words in Hydraulic Hose Sizing: I.D., Dash
2017-8-17 · People new to the hydraulic industry often ask what hose dash size means. Simply put, a dash size refers to an I.D. of a hydraulic hose or fitting in 1/16' increments. For example, -6 hose would indicate a hose with I.D. of 6/16' - or 3/8'. Hoses are measured by inside diameter, unlike tubes which are measured by outside diameter.
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