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Pressure Plugs
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SOCKET PRESSURE PLUGS -DRY SEAL (NPTF) TYPE - 3/4 TAPER
Dimensions in inches
NOMINAL SIZE D THREADS PER INCH J T G L
NOMINAL O.D. HEXAGON SOCKET SIZE KEY ENGAGEMENT WALL THICKNESS OVERALL LENGTH
NOM. MIN. MIN. NOM. Max. MIN.
1/16 0.312 27 5/32 0.1563 0.140 0.062 0.312 0.324 0.300
1/8 0.405 27 3/16 0.1875 0.140 0.062 0.312 0.324 0.300
1/4 0.540 18 1/4 0.2500 0.218 0.073 0.438 0.457 0.417
3/8 0.675 18 5/16 0.3125 0.250 0.084 0.500 0.520 0.480
1/2 0.840 14 3/8 0.3750 0.312 0.095 0.562 0.582 0.542
3/4 1.050 14 9/16 0.5625 0.312 0.125 0.625 0.645 0.605
1 1.315 11-1/2 5/8 0.6250 0.375 0.125 0.750 0.770 0.730
1-1/4 1.660 11-1/2 3/4 0.700 0.437 0.156 0.812 0.832 0.792
HEXAGON SOCKET PRESSURE PLUGS - DRYSEAL (NPTF) - Dryseal Pressure Plug is a plug that has a tapered (3/4 inch diametral per foot) thread extending its entire length and is designed to have its threads mesh tightly with those of a tapered - threaded hole. The thread truncation is closely controlled at root and crest to ensure metal to metal contact at these points, coincident to or prior to flank contact. This prevents spiral leakage and provides more positive sealing. Dryseal NPTF pressure plugs can be used in NPT tapped holes, but for fullest protection against leakage they should be used in dryseal tapped holes that are taper reamed before tapping. Threads conform to ANSI B2.2
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Socket Pressure Plugs Flush Type
Dimensions in inches
SOCKET PRESSURE PLUGS -FLUSH (PTF) TYPE - 7/8 TAPER
NOMINAL SIZE D THREADS PER INCH J T G L (3) BASIC PITCH DIAMETER AT SOCKET FACE
NOMINAL O.D. HEXAGON SOCKET SIZE KEY ENGAGEMENT WALL THICKNESS OVERALL LENGTH
NOM. MIN. MIN. MAX. MIN.
1/16 0.307 27 5/32 0.1563 0.140 0.052 0.250 0.235 0.28253
1/8 0.410 27 3/16 0.1875 0.140 0.049 0.250 0.235 0.37495
1/4 0.529 18 1/4 0.2500 0.218 0.045 0.406 0.391 0.49366
3/8 0.667 18 5/16 0.3125 0.250 0.040 0.406 0.391 0.62904
1/2 0.830 14 3/8 0.3750 0.312 0.067 0.531 0.516 0.78103
3/4 1.041 14 9/16 0.5625 0.312 0.054 0.531 0.516 0.99147
HEXAGON SOCKET PRESSURE PLUGS - FLUSH TYPE (PTF - 7/8). Flush Type Plug is a plug having a tapered thread (7/8" diametral per foot) extending its entire length and designed to provide a flush condition with a a standard tapered hole (3/4" diametral per foot) It achieves a high pressure seal through the difference in taper, with dimensions precalculated to provide a higher sealing load near the large end of the plug and the threads near the top of the tapped hole. It is used in applications where high pressures are encountered and where protrusion is undesirable.