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M 16.0 X 2.00 GO/NOGO

M 16.0 X 1.50 GO/NOGO

​M 17.0 X 1.00 GO/NOGO

M 18.0 X 2.50 GO/NOGO

M 18.0 X 1.50 GO/NOGO

M 20.0 X 2.50 GO/NOGO

M 20.0 X 1.50 GO/NOGO

M 22.0 X 2.50 GO/NOGO

M 22.0 X 1.50 GO/NOGO

M 24.0 X 3.0 GO/NOGO

M 24.0 X 2.00 GO/NOGO

M 27.0 X 3.00 GO/NOGO

M 27.0 X 2.00 GO/NOGO

M 30.0 X 3.50 GO/NOGO

M 30.0 X 2.00 GO/NOGO

M 30.0 X 1.50 GO/NOGO

M 33.0 X 3.50 GO/NOGO

M 33.0 X 2.00 GO/NOGO

M 35.0 X 1.50 GO/NOGO

M 36.0 X 4.00 GO/NOGO

M 36.0 X 3.00 GO/NOGO

M 36.0 X 2,00 GO/NOGO

M 39.0 X 4.00 GO/NOGO

M 39.0 X 3.00 GO/NOGO

M 39.0 X 2.00 GO/NOGO

Standard Metric Sizes

(Available in 6g class)


M 1.6 X 0.35 GO/NOGO

M 1.8 X 0.35 GO/NOGO

M 2.0 X 0.40 GO/NOGO

M 2.2 X 0.45 GO/NOGO

M 2.5 X 0.45 GO/NOGO

M 3.0 X 0.50 GO/NOGO

M 3.5 X 0.60 GO/NOGO

M 4.0 X 0.70 GO/NOGO

M 4.5 X 0.75 GO/NOGO

M 5.0 X 0.80 GO/NOGO

M 6.0 X 1.00 GO/NOGO

M 7.0 X 1.00 GO/NOGO

M 8.0 X 1.25 GO/NOGO

M 8.0 X 1.00 GO/NOGO

M 10.0 X 1.00 GO/NOGO

M 10.0 X 1.50 GO/NOGO

M 10.0 X 1.25 GO/NOGO

M 12.0 X 1.75 GO/NOGO

M 12.0 X 1.50 GO/NOGO

M 12.0 X 1.25 GO/NOGO

M 12.0 X 1.00 GO/NOGO

M 14.0 X 2.00 GO/NOGO

M 14.0 X 1.50 GO/NOGO

M 14.0 X 1,00 GO/NOGO

M 15.0 X 1.00 GO/NOGO

5/8-24 UNEF GO/NOGO

11/16-24 UNEF GO/NOGO

3/4-10 UNC GO/NOGO

3/4-16 UNF GO/NOGO

3/4-20 UNEF GO/NOGO

13/16-20 UNEF GO/NOGO

​7/8-9 UNC GO/NOGO

7/8-14 UNF GO/NOGO

7/8-20 UNEF GO/NOGO

15/16-20 UNEF GO/NOGO

1"-8 UNC GO/NOGO

1"-12 UNF GO/NOGO

1"-14 UNS GO/NOGO

1"-20 UNEF GO/NOGO

1" 1/16-12 UN GO/NOGO

1" 1/16-18 UNEF GO/NOGO

1" 1/8-7 UNC GO/NOGO

1" 1/8-12 UNF GO/NOGO

1" 1/8-18 UNEF GO/NOGO

1" 3/16-12 UN GO/NOGO

1" 3/16-18 UNEF GO/NOGO

1" 1/4-7 UNC GO/NOGO

1" 1/4-12 UNF GO/NOGO

1" 1/4-18 UNEF GO/NOGO

1" 5/16-12 UN GO/NOGO

1" 5/16-18 UNEF GO/NOGO

1" 3/8-6 UNC GO/NOGO

1" 3/8-12 UNF GO/NOGO

1" 3/8-18 UNEF GO/NOGO

1" 7/16-12 UN GO/NOGO

1" 7/16-18 UNEF GO/NOGO

1" 1/2-6 UNC GO/NOGO

1" 1/2-12 UNF GO/NOGO

1" 1/2-18 UNEF GO/NOGO

1" 5/8-12 UN GO/NOGO

1" 3/4-12  GO/NOGO

1" 7/8-12 UN GO/NOGO

2"-12 GO/NOGO

2" 1/4-12 GO/NOGO

2" 1/2-12 GO/NOGO

Standard English Sizes

(Available in 2A and 3A classes)


0-80 UNF GO/NOGO           

1-64 UNC GO/NOGO

1-72 UNF GO/NOGO

2-56 UNC GO/NOGO

2-64 UNF GO/NOGO

3-48 UNC GO/NOGO

3-56 UNF GO/NOGO

4-40 UNC GO/NOGO

4-48 UNF GO/NOGO

5-40 UNC GO/NOGO

5-44 UNF GO/NOGO

6-32 UNC GO/NOGO

6-40 UNF GO/NOGO

8-32 UNC GO/NOGO

8-36 UNF GO/NOGO

10-24 UNC GO/NOGO

10-32 UNF GO/NOGO

12-24 UNC GO/NOGO

12-28 UNF GO/NOGO

12-32 UNEF GO/NOGO

1/4-20 UNC GO/NOGO

1/4-28 UNF GO/NOGO 

1/4-32 UNEF GO/NOGO

5/16-18 UNC GO/NOGO

5/16-24 UNF GO/NOGO

5/16-32 UNEF GO/NOGO

3/8-16 UNC GO/NOGO

3/8-24 UNF GO/NOGO

​3/8-32 UNEF GO/NOGO

7/16-14 UNC GO/NOGO

7/16-20 UNF GO/NOGO

7/16-28 UNEF GO/NOGO

1/2-13 UNC GO/NOGO

1/2-20 UNF GO/NOGO

1/2-28 UNEF GO/NOGO

9/16-12 UNC GO/NOGO

9/16-18 UNF GO/NOGO

9/16-24 UNEF GO/NOGO

5/8-11 UNC GO/NOGO

5/8-18 UNF GO/NOGO


Glastonbury Southern Gage

Truncated Set Plugs (available in Steel, Chrome, and Carbide)

Shown is a Go and Nogo Truncated (Master) Set Plug. Set Plugs are used to set thread rings for proper fit and feel and inspect ring for wear. Set Plugs have a common pitch diameter the full thread length of the Go or Nogo section. The crest of the thread is truncated for the first half of the set plug and full form the remaining length. Pitch diameters conforms to class X, class W also available.