Continuous Tube Threads
CSDA-CT-111
Specification No.
CSDA-CT-111
Effective Date
Mar 30, 2004
Revised
1. General
1.1 This document standardizes the thread type, pitch and length on continuous tube and continental core bits.
1.2 All threads are Right Hand, 5-degree modified, Square Threads.
1.3 All dimensions are in inches.
1.75
Nominal Diameter | Wall Thickness | Thread Length | Threads Per Inch |
1 to 6 | 0.120 | 1.75 | 4 |
1 to 6 | 0.156 | 1.75 | 4 |
1 to 10 | 0.188 | 1.94 | 3 |
6 to 10 | 0.250 | 1.94 | 3 |
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