21. The dowels were helically grooved like a screw thread to locate the wires precisely in position. 22. The top is typically threaded with a 5 / 8 " x 11 tpi screw thread . 23. Slide hammers can be attached to objects in multiple ways including screw threads , hooks, and others. 24. Internal screw threads may be cut with dies. 25. :It sounds to me ( assuming there are no cracks ) like the screw threads are stripped. 26. Most hardware screw threads are right-handed helices. 27. For example, a leadscrew incorporates a screw thread , which is an inclined plane wrapped around a cylinder. 28. Cabinetmakers know that it's easier to drive screws into wood if you lubricate the screw threads first. 29. Sonor invented the modern screw thread drum-construction and the metal snare drum in the early 20th century. 30. :Many light bulbs have an Edison base ( that's the wide screw threads at the bottom ).
