Three Key Words in Hydraulic Hose Sizing: I.D., Dash
2017-8-17 · Sizing specifications for hydraulic hose include inner diameter, outer diameter, and length. Outer diameter (O.D.) measures the entire span of the hose cross-section, including the tube, reinforcement, and cover. The difference between the O.D. and I.D. is the thickness of the hose wall.
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