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  FASTENERS DIMENSIONAL DATA
Holo-Krome Socket Pressure Plugs
HOLO-KROME
SOCKET
PRESSURE
PLUGS 		Holo-Krome Pressure Plugs Dry Seal       Holo-Krome Pressure Plugs Dry Seal
  HOLO-KROME 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

HOLO-KROME HEXAGON SOCKET PRESSURE PLUGS - DRYSEAL (NPTF) - The Holo-Krome 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. Holo-Krome 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
  Holo-Krome Socket Pressure Plugs Flush Type
  Dimensions in inches

Holo-Krome Pressure Plugs Flush Fit

HOLO-KROME 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

HOLO-KROME HEXAGON SOCKET PRESSURE PLUGS - FLUSH TYPE (PTF - 7/8). The Holo-Krome 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.

Caution: Information is for general reference only.
For more complete specifications consult the standards referenced, or contact us.