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 5835-01-050-7882
NSN 5905-01-147-8044
NSN 5930-00-243-0226
NSN 5990-00-623-4198
NSN 5990-01-595-9441
NSN 5950-00-537-3385
NSN 5965-01-428-3348
NSN 5920-01-380-3196
NSN 5905-00-156-5791
NSN 6220-01-283-2829
NSN 5915-01-124-9347
NSN 6135-01-175-4589