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 gauges 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: 4.7 (34 customer reviews) $17.99 Add your review...

1) Submitted by Stan Oldenburg, from Morristown, AZ on 7/22/2011 Customer Rating: Bought this set as an addition to one I have that does 10-24 down to watch maker size. This set is well made and does practical sizes. The fact that they are all wired together makes it awkward but also helps prevent loosing individual sizes. I would definitley buy this again and recommend it to others.

2) Submitted by J. Witte, from Carmine, TX on 7/10/2011 Customer Rating: Technically, I am giving this product a 4+ rating. I bought the Thread Detective and immediately sized about 1000 nuts and bolts. It worked fine with one exception: the stud part of the 1/4-20 had a tendency to come loose and 'unscrew' from the ball. This initially happened when the 'detective' found a metric nut and it bit into the stud's threads. This is the only reason for a 4+ rating instead of a full 5. A drop of glue or epoxy should solve the problem. Would easily recommend this product.

3) Submitted by Donnie Fraley, from Rising Star, TX on 4/13/2011 Customer Rating: Very well made and useful product. Will pay for itself many times over.

4) Submitted by Jerry Bogna, from Acton, CA on 3/7/2011 Customer Rating: A good & useful addition to my tool chest. I ordered the metric one for use on motorcycles. Fast shipping was appreciated.

5) Submitted by Joel Laurance, from Potomac, MD on 1/30/2011 Customer Rating: Well made product. I should have gotten this years ago. If you don't carefully read the dscription while placing an order, you might think you get both metric and SAE for one price because of the picture. The molded plastic body is a little bulky and prevents using the female side on a stud in tight places. So I keep a wire unlatchable key ring attached to it with a nut of each size.

6) Submitted by Nancy Phillips, from Bellingham, WA on 1/18/2011 Customer Rating: Our son-in-law has a set! we purchased for a friend for Christmas. My husband is now ordering a set for himself!

7) Submitted by Paul Cote , from Exeter, NH on 12/27/2010 Customer Rating: Fast shipping, secure packaging, quality product. Picture shows both the the red and black versionsmetric and SAE which doesn't match the description. It is possible to assume you are getting both as I did. Picture should be corrected to reflect description.

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