Continuous Tube Threads


Specification No.



Effective Date

Mar 30, 2004



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.


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


This document has been developed or is provided by the Concrete Sawing & Drilling Association, Inc. It is intended as a guideline, sample specification or recommended practice for use by fully qualified, trained, professional personnel who are otherwise competent to evaluate the significance of its use within the context of specific concrete sawing and drilling projects. No express or implied warranty is made with respect to the foregoing including without limitation any implied warranty of fitness or applicability for a particular purpose. The Concrete Sawing & Drilling Association, Inc. and all contributors of this document shall not be liable for damages of any kind arising out of the use of this document, and, further specifically disclaims any and all responsibility and liability for the accuracy and application of the information contained in this document to the fullest extent permitted by law. In accepting this document, user agrees to accept sole responsibility for its application.