Click the images to find nominal size & learn about their features

Thread PLUG Gages

TAPERLOCK

Taperlock Thread Plug Gages

CLASS X TOLERANCE – RH – CHROME

Nominal SizeHandle Size
.060   0 – 80000
.073   1 – 64000
.073   1 – 72000
.086   2 – 56000
.086   2 – 64000
.099   3 – 48000
.099   3 – 56000
.112   4 – 4000
.112   4 – 4800
.125   5 – 4000
.125   5 – 4400
.138   6 – 3200
.138   6 – 4000
.164   8 – 320
.164   8 – 360
.190   10 – 240
.190   10 – 320
.216   12 – 240
.216   12 – 280
1/4 – 201
1/4 – 281
5/16 – 181
5/16 – 241
3/8 – 162
3/8 – 242
7/16 – 142
7/16 – 202
1/2 – 132
1/2 – 202
9/16 – 123
9/16 – 183
5/8 – 113
5/8 – 183
3/4 – 103
3/4 – 163
7/8 – 94
7/8 – 144
1 – 84
1 – 124
1 – 144
1-1/8 – 74
1-1/8 – 124
1-1/4 – 75
1-1/4 – 125
1-3/8 – 65
1-3/8 – 125
1-1/2 – 65
1-1/2 – 125
Nominal SizeHandle Size
M   1.6 x 0.35000
M   2 x 0.4000
M   2.5 x 0.45000
M   3 x 0.500
M   3.5 x 0.600
M   4 x 0.70
M   5 x 0.80
M   6 x 1.01
M   8 x 1.251
M   8 x 1.01
M   10 x 1.52
M   10 x 1.252
M   10 x 1.02
M   10 x 0.752
M   12 x 1.752
M   12 x 1.52
M   12 x 1.252
M   12 x 1.02
M   14 x 2.03
M   14 x 1.53
M   15 x 1.03
M   16 x 2.03
M   16 x 1.53
M   17 x 1.03
M   18 x 1.53
M   20 x 2.53
M   20 x 1.53
M   20 x 1.03
M   22 x 2.54
M   22 x 1.54
M   24 x 3.04
M   24 x 2.04
M   25 x 1.54
M   27 x 3.04
M   27 x 2.04
M   30 x 3.55
M   30 x 2.05
M   30 x 1.55
M   33 x 2.05
M   35 x 1.55
M   36 x 4.05
M   36 x 2.05
M   39 x 2.05-1/2

Inch

Nominal SizeHandle Size
12 – 320
1/4 – 321
5/16 – 321
3/8 – 322
7/16 – 282
1/2 – 282
9/16 – 243
5/8 – 243
11/16 – 243
3/4 – 203
13/16 – 203
7/8 – 204
15/16 – 204
1 – 204
1-1/16 – 184
1-1/8 – 184
1-3/16 – 185
1-1/4 – 185
1-5/16 – 185
1-3/8 – 185
1-7/16 – 185
1-1/2 – 185

Class

2B, 3B

Graphitic Tool Steel

All thread gages are made of the finest oil hardened graphitic tool steel available. Because of the graphitic lubricant qualities in this steel, (which reduces friction) and high carbon content, it produces superior long wearing qualities.

Hard Chrome

All standard thread plugs are supplied in hard chrome at no additional cost.

  • Heat treated and cold treated for extreme stability.
  • Lapped for extra precision and longer wear.

REVERSIBLE

Reversible Thread Plug Gages

CLASS X TOLERANCE – RH – CHROME

Nominal SizeHandle Size
.060   0 – 801W
.073   1 – 641W
.073   1 – 721W
.086   2 – 562W
.086   2 – 642W
.099   3 – 482W
.099   3 – 562W
.112   4 – 402W
.112   4 – 482W
.125   5 – 402W
.125   5 – 442W
.138   6 – 322W
.138   6 – 402W
.164   8 – 322W
.164   8 – 362W
.190   10 – 243W
.190   10 – 323W
.216   12 – 243W
.216   12 – 283W
1/4 – 203W
1/4 – 283W
5/16 – 184W
5/16 – 244W
3/8 – 164W
3/8 – 244W
7/16 – 145W
7/16 – 205W
1/2 – 135W
1/2 – 205W
9/16 – 126W
9/16 – 186W
5/8 – 116W
5/8 – 186W
3/4 – 107W
3/4 – 167W
Nominal SizeHandle Size
M   1.6 x 0.351W
M   2 x 0.42W
M   2.5 x 0.452W
M   3 x 0.52W
M   3.5 x 0.62W
M   4 x 0.72W
M   5 x 0.83W
M   6 x 1.03W
M   8 x 1.254W
M   8 x 1.04W
M   10 x 1.54W
M   10 x 1.254W
M   10 x 1.04W
M   10 x 0.754W
M   12 x 1.755W
M   12 x 1.55W
M   2 x 1.255W
M   12 x 1.05W
M   14 x 2.06W
M   14 x 1.56W
M   15 x 1.06W
M   16 x 2.06W
M   16 x 1.56W
M   17 x 1.07W
M   18 x 1.57W

Inch

Nominal SizeHandle Size
12 – 323W
1/4 – 323W
5/16 – 324W
3/8 – 324W
7/16 – 285W
1/2 – 285W
9/16 – 246W
5/8 – 246W
11/16 – 247W
3/4 – 207W

Class

2B, 3B

  • Graphitic tool steel for superior quality and longer wear
  • Heat treated and cold treated for extreme stability.
  • Lapped for extra precision and longer wear.

Hard Chrome

All standard thread plugs are supplied in hard chrome at no additional cost.

TRILOCK

Trilock Thread Plug Gages

CLASS X TOLERANCE – RH – CHROME

Nominal SizeHandle Size
7/8 – 92-1/2
7/8 – 142-1/2
1 – 83-1/2
1 – 123-1/2
1 – 143-1/2
1-1/8 – 73-1/2
1-1/8 – 123-1/2
1-1/4 – 74-1/2
1-1/4 – 124-1/2
1-3/8 – 64-1/2
1-3/8 – 124-1/2
1-1/2 – 64-1/2
1-1/2 – 124-1/2
Nominal SizeHandle Size
M   39 x 2.05-1/2

Inch

Nominal SizeHandle Size
13/16 – 202-1/2
7/8 – 202-1/2
15/16 – 203-1/2
1 – 203-1/2
1-1/16 – 183-1/2
1-1/8 – 183-1/2
1-3/16 – 184-1/2
1-1/4 – 184-1/2
1-5/16 – 184-1/2
1-3/8 – 184-1/2
1-7/16 – 184-1/2
1-1/2 – 184-1/2

Class

2B, 3B

  • Graphitic tool steel for superior quality and longer wear
  • Heat treated and cold treated for extreme stability.
  • Lapped for extra precision and longer wear.

Hard Chrome

All standard thread plugs are supplied in hard chrome at no additional cost.

THREAD RING

Thread Ring Gages

CLASS X TOLERANCE – RH – STEEL

Nominal Size
.060   0 – 80
.073   1 – 64
.073   1 – 72
.086   2 – 56
.086   2 – 64
.099   3 – 48
.099   3 – 56
.112   4 – 40
.112   4 – 48
.125   5 – 40
.125   5 – 44
.138   6 – 32
.138   6 – 40
.164   8 – 32
.164   8 – 36
.190   10 – 24
.190   10 – 32
.216   12 – 24
216   12 – 28
1/4 – 20
1/4 – 28
5/16 – 18
5/16 – 24
3/8 – 16
3/8 – 24
7/16 – 14
7/16 – 20
1/2 – 13
1/2 – 20
9/16 – 12
9/16 – 18
5/8 – 11
5/8 – 18
3/4 – 10
3/4 – 16
7/8 – 9
7/8 – 14
1 – 8
1 – 12
1 – 14
1-1/8 – 7
1-1/8 – 12
1-1/4 – 7
1-1/4 – 12
1-3/8 – 6
1-3/8 – 12
1-1/2 – 6
1-1/2 – 12
Nominal Size
1.6 x 0.35
M   2 x 0.4
M   2.5 x 0.45
M   3 x 0.5
M   3.5 x 0.6
M   4 x 0.7
M   5 x 0.8
M   6 x 1.0
M   8 x 1.25
M   8 x 1.0
M   10 x 1.5
M   10 x 1.25
M   10 x 1.0
M   10 x 0.75
M   12 x 1.75
M   12 x 1.5
M   12 x 1.25
M   12 x 1.0
M   14 x 2.0
M   14 x 1.5
M   15 x 1.0
M   16 x 2.0
M   16 x 1.5
M   17 x 1.0
M   18 x 1.5
M   20 x 2.5
M   20 x 1.5
M   20 x 1.0
M   22 x 2.5
M   22 x 1.5
M   24 x 3.0
M   24 x 2.0
M   25 x 1.5
M   27 x 3.0
M   27 x 2.0
M   30 x 3.0
M   30 x 2.0
M   30 x 1.5
M   33 x 2.0
M   35 x 1.5
M   36 x 4.0
M   36 x 2.0
M   39 x 2.0

Inch

Nominal Size
12 – 32
1/4 – 32
5/16 – 32
3/8 – 32
7/16 – 28
1/2 – 28
9/16 – 24
5/8 – 24
11/16 – 24
3/4 – 20
13/16 – 20
7/8 – 20
15/16 – 20
1 – 20
1-1/16 – 18
1-1/8 – 18
1-3/16 – 18
1-1/4 – 18
1-5/16 – 18
1-3/8 – 18
1-7/16 – 18
1-1/2 – 18

Class

2A, 3A

Root Relieved Thread Ring Gages

Thread ring gages are root relieved for longer and more accurate gaging life. A root clearance at the major
diameter eliminates any possibility of interference from the full form of the setting plug and major diameter of
the part being checked. This gives assurance that flanks of thread are making proper contact.

  • Graphitic tool steel for superior quality and longer wear
  • Heat treated and cold treated for extreme stability.
  • Lapped for extra precision and longer wear.

Hard Chrome

Add 10% for hard chrome gages.

STI GAGES

Thread Plug STI Gages

R.H. FOR HELICAL COIL THREAD PLUG GAGE MEMBERS TAPERLOCK, FOR SCREW THREAD INSERT TYPE TAPPED HOLES

Inch

Nominal SizeHandle Size
2 – 5600
2 – 6400
3 – 4800
3 – 5600
4 – 4000
4 – 4800
5 – 400
6 – 320
6 – 400
8 – 320
8 – 360
10 – 240
10 – 320
12 – 241
1/4 – 201
1/4 – 281
5/16 – 182
5/16 – 241
3/8 – 162
3/8 – 242
7/16 – 143
7/16 – 203
1/2 – 133
1/2 – 203
9/16 – 123
9/16 – 183
5/8 – 113
5/8 – 183
3/4 – 104
3/4 – 163

Class

2B, 3B

STI gages are used to gage threads after tapping prior to insertion of Helical Coil wire inserts.

SETTING PLUG

Setting Plug Gages

CLASS W TOLERANCE PITCH DIAMETER, CLASS W TOLERANCE ON LEAD & ANGLE – RH – STEEL

Nominal SizeHandle Size
.060   0 – 80000
.073   1 – 64000
.073   1 – 72000
.086   2 – 56000
.086   2 – 64000
.099   3 – 48000
.099   3 – 56000
112   4 – 4000
.112   4 – 4800
.125   5 – 4000
.125   5 – 4400
.138   6 – 3200
.138   6 – 4000
.164   8 – 320
.164   8 – 360
.190   10 – 240
.190   10 – 320
.216   12 – 240
.216   12 – 280
1/4 – 201
1/4 – 281
5/16 – 181
5/16 – 241
3/8 – 162
3/8 – 242
7/16 – 142
7/16 – 202
1/2 – 132
1/2 – 202
9/16 – 123
9/16 – 183
5/8 – 113
5/8 – 183
3/4 – 103
3/4 – 163
7/8 – 94
7/8 – 144
1 – 84
1 – 124
1 – 144
1-1/8 – 74
1-1/8 – 124
1-1/4 – 75
1-1/4 – 125
1-3/8 – 65
1-3/8 – 125
1-1/2 – 65
1-1/2 – 125
Nominal SizeHandle Size
M   1.6 x 0.35000
M   2 x 0.4000
M   2.5 x 0.45000
M   3 x 0.500
M   3.5 x 0.600
M   4 x 0.70
M   5 x 0.80
M   6 x 1.01
M   8 x 1.251
M   8 x 1.01
M   10 x 1.52
M   10 x 1.252
M   10 x 1.02
M   10 x 0.752
M   12 x 1.752
M   12 x 1.52
M   12 x 1.252
M   12 x 1.02
M   14 x 2.03
M   14 x 1.53
M   15 x 1.03
M   16 x 2.03
M   16 x 1.53
M   17 x 1.03
M   18 x 1.53
M   20 x 2.53
M   20 x 1.53
M   20 x 1.03
M   22 x 2.54
M   22 x 1.54
M   24 x 3.04
M   24 x 2.04
M   25 x 1.54
M   27 x 3.04
M   27 x 2.04
M   30 x 3.55
M   30 x 2.05
M   30 x 1.55
M   33 x 2.05
M   35 x 1.55
M   36 x 4.05
M   36 x 2.05
M   39 x 2.05-1/2

Inch

Nominal SizeHandle Size
12 – 320
1/4 – 321
5/16 – 321
3/8 – 322
7/16 – 282
1/2 – 282
9/16 – 243
5/8 – 243
11/16 – 243
3/4 – 203
13/16 – 203
7/8 – 204
15/16 – 204
1 – 204
1-1/16 – 184
1-1/8 – 184
1-3/16 – 185
1-1/4 – 185
1-5/16 – 185
1-3/8 – 185
1-7/16 – 185
1-1/2 – 185

Class

2A, 3A

Truncated Setting Plugs

Truncated extra length setting plugs insure more perfect size. Truncated set plug is the same as full-form set
plug except with crest of thread removed for approximately one-half length of gage, giving a full and truncated
portion. The full portion insures correct clearance and forms at major diameter of ring. Truncated portion
controls pitch diameter.

When using truncated setting plug, thread ring gage should be set on the full form of the set plug. The ring
should then be turned on the truncated form, and the “feel” should be the same as on the full form. If there is a
“shake” on the truncated form, this will indicate that the thread form of the ring is unsatisfactory and should
be discarded, or if possible, repaired by relapping.

  • Graphitic tool steel for superior quality and longer wear
  • Heat treated and cold treated for extreme stability.
  • Lapped for extra precision and longer wear.

NPT

NPT Thread Gages

Inch

Nominal SizeThreads per inchHandle Size
1/16271
1/8272
1/4183
3/8183
1/2144
3/4144
111.55
1 – 1/411.55
1 – 1/211.55
211.55

Inch

Nominal SizeThreads per inch
1/1627
1/827
1/418
3/818
1/214
3/414
111.5
1 – 1/411.5
1 – 1/211.5
211.5

L1 thread plugs are supplied with one step as standard.

Add 10% for hard chrome rings

NPTF & ANPT

NPTF & ANPT Gages

Inch

Nominal SizeThreads per inchHandle Size
1/16271
1/8272
1/4183
3/8183
1/2144
3/4144
111.55
1 – 1/411.55
1 – 1/211.55
211.55

Inch

Nominal SizeThreads per inch
1/1627
1/827
1/418
3/818
1/214
3/414
111.5
1 – 1/411.5
1 – 1/211.5
211.5

L1 & L3 thread plugs are supplied with one step as standard.

Add 10% for hard chrome gages

Plug

L1, L3, 6 Step

Ring

L1, L2, 6 Step

NPSM

Straight Pipe Thread Gages (NPSM)

Inch

Nominal SizeHandle Size
1/8 – 272
1/4 – 183
3/8 – 183
1/2 – 144
3/4 – 144
1 – 11-1/25
1-1/4 – 11-1/26
1-1/2 – 11-1/26
2 – 11-1/26
2-1/2 – 87
3 – 87

Inch

Nominal Size
1/18 – 27
1/4 – 18
3/8 – 18
1/2 – 14
3/4 – 14
1 – 11-1/2
1-1/4 – 11-1/2
1-1/2 – 11-1/2
2 – 11-1/2
2-1/2 – 8
3 – 8

Inch

Nominal SizeHandle Size
1/18 – 272
1/4 – 183
3/8 – 183
1/2 – 144
3/4 – 144
1 – 11-1/25
1-1/4 – 11-1/26
1-1/2 – 11-1/26
2 – 11-1/26
2-1/2 – 87
3 – 87

Consult factory for information on:

  • NPSC
  • NPSH & NH
  • NPSF & NPSI

Plug

Class 2B

Ring & Settings Plug

Class 2A

Plain Gages

TAPERLOCK

Taperlock

CLASS X TOLERANCE

Nominal SizeHandle Size
.125 – .15000
.1501 – .18500
.1851 – .23000
.2301 – .36501
.3651 – .51002
.5101 – .82503
.8251 – 1.1354
1.1351 – 1.51005
Nominal SizeHandle Size
3.1750 – 3.810000
3.8125 – 4.69900
4.7015 – 5.84200
5.8445 – 9.27101
9.2736 – 12.9542
12.9566 – 20.95503
20.9576 – 28.82914
28.8316 – 38.35415

Class

XX, X, Y, Z

Features

  • Progressive design add price of go & no go members
  • Class XXX – quoted upon request
  • Hard chrome & carbide quoted upon request
  • Unilateral tolerance furnished unless otherwise specified (go plus, no go minus)

Quantity prices apply to identical sizes.

REVERSIBLE

Reversible Plain Plug Gages

CLASS X TOLERANCE

Nominal SizeHandle Size
.0100 – .03001W
.0301 – .05001W
.0501 – .07501W
.0751 – .18002W
.1801 – .28103W
.2811 – .40604W
.4061 – .51005W
.5101 – .63506W
.6351 – .76007W
Nominal SizeHandle Size
.2540 – .76201W
.7645 – 1.2701W
1.2725 – 1.90501W
1.9075 – 4.57202W
4.5780 – 7.13743W
7.1399 – 10.31254W
10.3150 – 12.95405W
12.9565 – 16.12906W
16.1316 – 19.30407W

Class

XX, X, Y, Z

Features

  • All members 2” long
  • Class XXX – quoted upon request
  • Hard chrome & carbide quoted upon request
  • Unilateral tolerance furnished unless otherwise specified (go plus no go minus)
  • Chrome reversible plugs under .0350 are not available

Quantity prices apply to identical sizes.

TRILOCK

Trilock Plain Plug Gages

CLASS X TOLERANCE

Nominal SizeHandle Size
.7601 – .9472 – 1/2
.94701 – 1.13503 – 1/2
1.1351 – 1.5104 – 1/2
1.5101 – 2.0105 – 1/2
2.01010 – 2.5106
2.51001 – 3.0107
3.0101 – 3.5107
3.5101 – 4.0107
4.0101 – 4.5107
4.5101 – 5.01007
5.0101 – 5.5107
5.5101 – 6.0107
6.0101 – 6.5107
6.5101 – 7.0107
7.0101 – 7.5107
7.5101 – 8.0107
Nominal SizeHandle Size
19.30 – 24.052 – 1/2
24.0501 – 28.833 – 1/2
28.8301 – 38.354 – 1/2
38.3501 – 51.055 – 1/2
51.0501 – 63.756
63.7501 – 76.457
76.4501 – 89.157
89.1501 – 101.857
101.85011 – 114.557
114.55 – 127.257
127.25 – 139.957
139.95 – 152.657
152.65 – 165.357
165.35 – 178.057
178.05 – 190.757
190.75 – 203.457

Class

XX, X, Y, Z

Features

  • Progressive design add price of go & no go members
  • Class XXX – quoted Upon Request
  • Hard chrome & carbide quoted upon request
  • Unilateral tolerance furnished unless otherwise specified (go plus, no go minus)

Quantity prices apply to identical sizes.

RING

Master and Plain Ring Gages

CLASS X TOLERANCE

Nominal Size
.062 – .1000
.1001 – .1250
.1251 – .1500
.1501 – .1850
.1851 – .2400
.2401 – .3650
.3651 – .5100
.5101 – .8250
.8251 – 1.135
1.1351 – 1.5100
1.5101 – 2.0100
2.0101 – 2.5100
2.5101 – 3.0100
3.0101 – 3.5100
3.5101 – 4.0100
4.0101 – 4.7600
4.7601 – 5.5100
5.5101 – 6.0000
Nominal Size
1.91 – 2.54
2.54 – 3.15
3.15 – 3.81
3.81 – 4.70
4.70 – 6.10
6.10 – 9.27
9.27 – 12.95
12.95 – 20.96
20.96 – 28.83
28.83 – 38.35
38.35 – 51.05
51.05 – 63.75
63.75 – 76.45
76.45 – 89.15
89.15 – 101.85
101.85 – 120.95
120.95 – 139.95
139.95 – 152.40

Class

XX, X, Y, Z

Features

  • All rings made to AGD Specifications
  • Hard chrome & carbide quoted upon request
  • Plain rings – Go tolerance minus, no go tolerance plus
  • Master rings – Made to bilateral tolerance (50% plus 50% minus)
  • Prices over 6.000 on request
  • Chrome rings under .125 not available
  • Class XXX – quoted upon request

MASTER SETTING DISCS

Master Setting Discs Gages

CLASS X TOLERANCE

Nominal Size
.105 – .150
.1501 – .2400
.2401 – .365
.365 – .510
.5101 – .825
.825 – 1.135
1.1351 – 1.510
1.5101 – 2.010
2.0101 – 2.510
2.5101 – 3.010
3.0101 – 3.510
3.5101 – 4.010
4.0101 – 4.510
4.5101 – 5.010
Nominal Size
2.67 – 3.81
3.8101 – 6.10
6.1001 – 9.27
9.2701 – 12.95
12.9501 – 20.96
20.9601 – 28.83
28.8301 – 38.35
38.3501 – 51.05
51.0501 – 63.75
63.7501 – 76.45
76.4501 – 89.15
89.1501 – 101.85
101.8501 – 114.55
114.5501 – 127.25

Class

XX, X, Y, Z

Style 1, 2 and 3 available

Features

  • All tolerances are bilateral (50% plus 50% minus) except No. 2
  • Hard chrome & carbide quoted upon request
  • Class XXX – quoted upon request
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