Archived from the Tools In Action forum (In The Shop). This thread is read-only.
Back when the US was THE global superpower, we could have asserted dominance and dominion to relegate the metric system (and metric fasteners) to the dust heap of history. That ship has sailed. Now the Chinese are in charge and are ONLY interested in making / taking every single dollar and don’t care about this issue.
Now we (and everyone else) are forced to deal w/ both SAE and metric hardware, w/ many fasteners having almost identical outside diameter and thread pitch a tread checker tool is essential for many projects.
We have all used this tool in hardware shops and I FINALLY decided to get my own and to mount it onto the door jamb of my workshop storage room, next to my hardware / fastener storage.
This is attached using three ¼”x2″ hanger bolts, w/ washers and hand tightened nuts, permitting easy removal for remote usage.
[External image (live.staticflickr.com), not copied]
That is awesome insight and agree. I want one of those for my wall. Can’t tell you how many times that would have come in handy.
This thread checking tool permits verification of fasteners with these thread sizes:
SAE (Male and Female Threads)
- 6-32 (UNC)
- 8-32 (UNC)
- 10-24 (UNC)
- 10-32 (UNF)
- ¼-20 (UNC)
- ¼-28 (UNF)
- 5/16-18 (UNC)
- 5/16-24 (UNF)
- 3/8-16 (UNC)
- 3/8-24 (UNF)
- 7/16-14 (UNC)
- 7/16-20 (UNF)
- ½-13 (UNC)
- ½-20 (UNF)
- 9/16-12 (UNC)
- 9/16-18 (UNF)
Metric (Male and Female Threads)
- M4X0.7 (Standard)
- M5X0.8 (Standard)
- M6X1.0 (Standard)
- M7X1.0 (Standard)
- M8X1.0 (Fine)
- M8X1.25 (Standard)
- M10X1.0 (Super Fine)
- M10X1.25 (Fine)
- M10X1.5 (Standard)
- M12X1.25 (Super Fine)
- M12X1.5 (Fine)
- M12X1.75 (Standard)
Unthreaded Screw Outside Diameter Measurement
- #0
- #1
- #2
- #3
- #4
- #6
- #8
- #10
- #12
- #14
Screw Length Measurement from Edge
- 0 to 6″ (1/16″ Graduations)
- 0 to 15 cm (1 mm Graduations)
That’s a good one. I have seen at some hardware stores where it only has the common sizes, it’s half the size.