1
The two heads are four inches in length, one inch of which is provided with a screw thread.
2
The larger portion is about twice as thick as the smaller, to allow room for the screw threads.
3
She fished out a short metal bracket drilled with four holes, a scorched screw threaded through each hole.
4
After a year in use the tubes can be unscrewed with ease, and the screw threads are perfectly smooth.
5
Tap - Cut screw threads
6
The screw threads should be filled with fireclay (as recommended by Faraday) before the joint is screwed up.
7
A screw may be turned into hardwood easily, by boring a small hole and lubricating the screw threads with soft soap.
8
A hybrid denture is one that is fabricated over a metal framework and retained by screws threaded into the implant abutments.
9
18 a screw thread tool, and Fig.