As differentiated by wall thickness and length
A tubular item of glass having a uniform cross section throughout its entire length. It may have reference and/or indicator markings and is generally used where the conveying, containing, or visual inspection of liquids and/or gasses are required, such as laboratories. Excludes insulator (1), washer; and washer (as modified).
Classification: Tubes of fused quartz or other fused silica, unworked
NSN 5996-00-392-7626
NSN 5950-00-077-1563
NSN 5996-01-538-8275
NSN 5930-01-269-1084
NSN 5960-01-076-4708
NSN 5999-00-946-8521
NSN 5920-01-130-9683
NSN 5985-00-277-7371
NSN 6645-00-991-8704
NSN 6240-00-801-8002
NSN 5999-00-972-9588
NSN 6320-01-422-1212