Lock joint | Article about lock joint by The Free Dictionary
lock joint[′läk ‚jȯint]
A joint made by interlocking the joined elements, with or without other fastening.
lock seam, lock joint
A joint or seam in sheet-metal roofing; the two edges are bent over in the form of hooks which are inserted in each other; then they are dressed down to form a seam.
References in periodicals archive
Steel Warehouse's sister company Lock Joint
Tube ljtube.com, produces mechanical and structural grade steel tubing.
It's a rhythmic movement: Don't lock joints
or hunch forward for momentum.