a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work. ... This teat acts as a guide for the countersink and reams out a cone-shaped hole which is concentric with the tapped hole, so when the patch bolt is screwed ... bolt will fit nice and snug and make a good, tight joint.
Title | : | Laying out for boiler makers and sheet metal workers |
Author | : | |
Publisher | : | - 1918 |
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