Calculated values are theoretical yield strengths and are considered accurate to within ±20%. They assume the worst-case scenario based on API tolerance. All strengths assume straight and steady pulling of a fully engaged round fish. Any irregularities in the fish ID/OD, damage to the grapple or mandrel, or jarring can reduce the strength substantially. Ratings are based only on grapple range. These values are presented without any safety factor. Please contact NOV Engineering if there are any questions.
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