National Pipe Tapered Fuel (NPTF) hydraulic connectors are physically ... ” of if they’re “farmer.” “Factory fittings” break loose with a good smack of my hand to the end of a wrench.

MODEL 950 HYDRAULIC DRILL PIPE SPINNER The hydraulically powered Model 950-H can spin drill ... This light weight tool is narrower and has a lower profile than previous spinning wrench designs.

This article was originally published with the title “ A Leather Cup Die, Combination Pipe and Monkey Wrench, and more ” in Scientific American Magazine Vol. 105 No. 13 (September 1911), p ...