The ornamental design embodiment of a threadgaugeholder/retainer, as shown and described.
FIG. 1 is a one quarter bottom perspective view of a thread gauge holder, with retained thread gauges shown in in clotted line, showing the ornamental design of this invention;
FIG. 2 is a one quarter top perspective view front the right of the thread gauge holder;
FIG. 3 is a right side elevational view of the thread gauge holder;
FIG. 4 is a left side elevational view of the thread gauge holder;
FIG. 5 is a top plan view of the thread gauge holder;
FIG. 6 is a bottom plan view of the thread gauge holder;
FIG. 7 is a left end view of the thread gauge holder;
FIG. 8 is a right end view of the thread gauge holder; and,
FIG. 9 is a one quarter top perspective view from the left side of the thread gauge holder showing a longer tie for slideability of retainers therealong.