Threaded Gages Online
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Call Us: 800-248-7260
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American National and Unified Form Threads Class X Tolerance For "GO" and "NOT GO" Thread Gages |
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TPI
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LEAD
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HALF ANGLE
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MAJOR or MINOR DIAMETERS
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PITCH DIAMETER
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+
- |
+
- |
To and Incl. 4"
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Above 4" Diam.
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To and Incl. 11⁄2"
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Above 11⁄2" to 4" Incl.
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Above 4" to 8" Incl.
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80
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.0002
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30 min.
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.0003
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--
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.0002
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--
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--
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72
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.0002
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30 min.
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.0003
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--
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.0002
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--
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--
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64
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.0002
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30 min.
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.0004
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--
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.0002
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--
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--
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56
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.0002
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30 min.
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.0004
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--
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.0002
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.0003
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--
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48
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.0002
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30 min
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.0004
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--
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.0002
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.0003
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--
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44
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.0002
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20 min
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.0004
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--
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.0002
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.0003
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--
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40
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.0002
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20 min
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.0004
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--
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.0002
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.0003
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--
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36
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.0002
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20 min
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.0004
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--
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.0002
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.0003
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--
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32
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.0003
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15 min
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.0005
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.0007
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.0003
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.0004
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.0005
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28
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.0003
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15 min
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.0005
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.0007
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.0003
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.0004
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.0005
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|
24
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.0003
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15 min
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.0005
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.0007
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.0003
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.0004
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.0005
|
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20
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.0003
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15 min
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.0005
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.0007
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.0003
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.0004
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.0005
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18
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.0003
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10 min.
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--
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.0007
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.0003
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.0004
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.0005
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16
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.0003
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10 min.
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.0006
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.0009
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.0003
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.0004
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.0006
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14
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.0003
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10 min.
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.0006
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.0009
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.0003
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.0004
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.0006
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13
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.0003
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10 min.
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.0006
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.0009
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.0003
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.0004
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.0006
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12
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.0003
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10 min
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.0006
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.0009
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.0003
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.0004
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.0006
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11
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.0003
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10 min
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.0006
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.0009
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.0003
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.0004
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.0006
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10
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.0003
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10 min
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.0006
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.0009
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.0003
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.0004
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.0006
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9
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.0003
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10 min
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.0007
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.0011
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.0003
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.0004
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.0006
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8
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.0004
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5 min.
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.0007
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.0011
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.0004
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.0005
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.0006
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7
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.0004
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5 min.
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.0007
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.0011
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.0004
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.0005
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.0006
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6
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.0004
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5 min.
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.0008
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.0013
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.0004
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.0005
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.0006
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5
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.0004
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5 min.
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.0008
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.0013
|
--
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.0005
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.0006
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41⁄2
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.0004
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5 min.
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.0008
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.0013
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--
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.0005
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.0006
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4
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.0004
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5 min.
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.0009
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.0015
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--
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.0005
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.0006
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Thread Gages are made to Class X tolerances unless otherwise specified on orders or drawings.
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Direction of Tolerances
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MAJOR DIAMETER FULL FORM
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MAJOR DIAMETER TRUNCATED SECTION
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PITCH DIAMETER
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MINOR DIAMETER
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"GO" Work Plug
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Plus
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--
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Plus
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--
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"NOT GO" Work Plug
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Minus
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--
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Minus
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--
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"GO" Ring
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--
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--
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Minus
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Minus
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"NOT GO" Ring
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--
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--
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Plus
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Plus
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"GO" Set Plug
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Plus
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Minus
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Minus
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--
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"NOT GO" Set Plug
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Plus
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Minus
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Plus
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--
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