These are all one of the eight common time fuse adapters used by Confederate artillery.  All have the standard 0.98 inch body diameter with 12 threads per inch. They range in length from 1.4” to 1.9”. No uniformity on length is common since they were manufactured in small southern shops. These were all recovered by one individual who was one of the first persons to hunt the Trevilian Station battle area. All fuses are as good if not better than the ones in the photograph.