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Pressure Plugs

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
	NOMINAL O.D.		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

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
	NOMINAL O.D.		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.

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