Thread Detective Screw Gauge

Whether you’re trying to identify loose screws or you just want to figure out which nuts and bolts to use where, the Thread Detective is the perfect tool. Available in standard or metric, it features clearly marked gauges for quick identification of bolt size, nut diameter and thread pitch. Standard guages are black with 14 measuring gauges. Metric gauges are red with 11 measuring gauges. Includes heavy-wire lanyard and handy inch/mm ruler for measuring studs.

Standard (black) Thread Detectives include the following thread gauges: 1/2-13 7/16-20 5/16-18 1/4-28 8-32 1/2-20 3/8-16 5/16-24 10-24 6-32 7/16-14 3/8-24 1/4-20 10-32 Metric (red) Thread Detectives include the following thread gauges: M12x1.75 M10x1.5 M8x1.25 M5x0.8 M12x1.5 M10x1.25 M8x1.0 M4x0.7 M12x1.25 M10x1.0 M6x1.0

Customer Reviews and Photos for: Thread Detective Screw Gauge Average Rating: (4.9) (9 customer reviews) Add your review...

1) Submitted by Rory Freeman, from Easton, CT on 11/1/2009 Customer Rating: Now that I've owned both the SAE & metric sets for nearly three months, I've discovered one (only) drawback to these gems... Using the gauges' individual male bolts is VERY cumbersome in that it is difficult to rotate an individual male bolt with all the other gauges still attached. If only there was some way to separate individual gauges when you need to. Now don't get me wrong - I still think these are great products and I still recommend them highly.

2) Submitted by Mike Miller, from Noblesville, IN on 9/17/2009 Customer Rating: Another Rockler winner! Saves time and easy to use. I have both the SAE and metric versions and they are great. Thanks, Rockler.

3) Submitted by Terry, from Martin, SC on 9/8/2009 Customer Rating: Age old problem now solved with these screw gauges (male & female). I ordered both Standard & Metric... must have tools in your workshop. Thanks Rockler.

4) Submitted by Ralph B Houser III, from Vancouver, WA on 9/5/2009 Customer Rating: I had the standard thread guage tool and found it cumbersome. These make sizing an unknown screw or bolt a snap. I've got them hung in an easy access postition in my shop as they will get frequent use.

5) Submitted by Jim Alloway, from Catskill, NY on 11/22/2009 Customer Rating: I have both sets. Well made, heavy duty - doesn't feel like it will break in your hands with heavy use. Great if used as pictured on the website - you have a nut or bolt and you can place it in the thread checker. Not very good if you have to take the gauge to the part being checked. If you need to determine the thread of a part that is mounted in a piece of equipment, it is very difficult to use this gauge because they are all linked together with no way to separate them other than to cut the wire cable. Impossible to turn in tight quarters.

6) Submitted by Kevin Gregoire, from Vermillion, SD on 9/5/2009 Customer Rating: This is a very ingenious product, very well made and just a nice heavy duty product. I have it on the wall next to my nut & bolt bin so when I need something I can easily check it out and find the right size and thread by matching up a nut or bolt I already have. Sure beats using one of those cheap plastic things with holes and stubs on it and then wasting time getting out a thread gauge tool. Very simple to use so just buy it you won't regret it!

7) Submitted by Ted Zabel, from Sobieski, WI on 9/4/2009 Customer Rating: SAE products are very familiar but metrics are difficult to size accurately, this tool set will make identifying metric threads straight forward, great tool.

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