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The slip joint includes a gasket that fits snugly on a pipe end, with a threaded nut behind the gasket, but with gasket position adjustable as needed. This pipe end fits loosely into another with a flange for the gasket to seal against, and threads for the nut to clamp the gasket to the flange.
They include a detached (movable) slip nut and slip-joint washer; the washer is made of rubber or nylon. [17] An advantage of this type of fitting is that the pipe it is connecting to does not need to be cut to a precise length; the slip joint can attach within a range of the end of the inserting pipe.
Two nuts, tightened on each other. In this application a thinner nut should be placed adjacent to the joint, and a thicker nut tightened onto it. The thicker nut applies more force to the joint, first relieving the force on the threads of the thinner nut and then applying a force in the opposite direction.
Slip-critical joint, from structural engineering, is a type of bolted structural steel connection which relies on friction between the two connected elements rather than bolt shear or bolt bearing to join two structural elements.
This is a combination of the nut applying an axial clamping force and also the shank of the bolt acting as a dowel, pinning the joint against sideways shear forces. For this reason, many bolts have a plain unthreaded shank (called the grip length ), as this makes for a better, stronger dowel.
Nuts must meet ASTM A563, which also uses heavy hex geometry. [9] Dimensions of heavy hex geometry are per document ANSI/ASME B18.2.6, which uses "coarse" threads as defined by Unified Thread Standard. ASTM 325 bolts can be considered equivalent to Grade 8.8 bolts according to ASTM F568M. [citation needed]
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