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Gauge Connector

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Instruments | Tube Fittings | Tube to Female Pipe

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Dimensions
How To Order
Tubing & Pipe end Thread Information
Features

Dimensions

Connects Fractional Tube to ISO Parallel Thread (Gauge)
Part No.	Tube OD T		P ISO 228/1	Dimensions (mm)
	Tube OD T			E Min.	h		H		F	I	I₁	L₁
	inch	mm		E Min.	inch	mm	inch	mm	F	I	I₁	L₁
UFC-0402GG	1/4	6.35	1/8	4.8	9/16	14.28	9/16	14.28	15.2	26.3	12.0	33.6
UFC-0404GG	1/4	6.35	1/4	4.8	3/4	19.05	9/16	14.28	15.2	30.2	13.0	37.6
UFC-0406GG	1/4	6.35	3/8	4.8	15/16	23.81	9/16	14.28	15.2	30.2	14.2	37.6
UFC-0408GG	1/4	6.35	1/2	4.8	1-1/16	26.98	9/16	14.28	15.2	36.1	18.8	43.4
UFC-0504GG	5/16	7.93	1/4	5.6	3/4	19.05	5/8	15.87	16.3	31.0	13.0	38.4
UFC-0508GG	5/16	7.93	1/2	7.1	1-1/16	26.98	5/8	15.87	16.3	33.5	18.8	40.9
UFC-0604GG	3/8	9.52	1/4	5.6	3/4	19.05	11/16	17.46	16.8	31.8	13.0	39.1
UFC-0606GG	3/8	9.52	3/8	6.6	15/16	23.81	11/16	17.46	16.8	31.2	14.2	38.6
UFC-0608GG	3/8	9.52	1/2	7.1	1-1/16	26.98	11/16	17.46	16.8	34.5	19.0	41.9
UFC-0804GG	1/2	12.70	1/4	5.6	7/8	22.22	7/8	22.22	22.9	31.8	13.0	42.0
UFC-0806GG	1/2	12.70	3/8	6.6	15/16	23.81	7/8	22.22	22.9	34.3	14.2	44.5
UFC-0808GG	1/2	12.70	1/2	7.1	1-1/16	26.98	7/8	22.22	22.9	38.1	19.0	48.3

Connects Metric Tube to ISO Parallel Thread (Gauge)
Part No.	Tube OD T	P ISO 228/1	Dimensions (mm)
	Tube OD T		E Min.	h	H	F	I	I₁	L₁
	mm		E Min.	mm	mm	F	I	I₁	L₁
UFC-M0304GG	3	1/4	2.4	19.05	11.11	12.9	28.7	13.0	35.3
UFC-M0604GG	6	1/4	4.8	19.05	14.28	15.3	30.2	13.0	37.6
UFC-M0606GG	6	3/8	4.8	23.81	14.28	15.3	30.2	14.2	37.6
UFC-M0608GG	6	1/2	4.8	26.98	14.28	15.3	36.3	19.0	43.7
UFC-M0804GG	8	1/4	5.5	19.05	15.87	16.2	31.0	13.0	38.5
UFC-M0806GG	8	3/8	6.5	23.81	15.87	16.2	28.7	14.0	36.2
UFC-M0808GG	8	1/2	7.0	26.98	15.87	16.2	33.0	19.0	40.5
UFC-M1004GG	10	1/4	5.5	19.05	19.05	17.2	31.8	13.0	39.4
UFC-M1006GG	10	3/8	6.5	23.81	19.05	17.2	31.2	14.2	38.8
UFC-M1008GG	10	1/2	7.0	26.98	19.05	17.2	34.5	19.0	42.1
UFC-M1204GG	12	1/4	5.5	22.22	22.22	22.8	31.8	13.0	41.9
UFC-M1206GG	12	3/8	6.5	23.81	22.22	22.8	34.3	14.0	44.4
UFC-M1208GG	12	1/2	7.0	26.98	22.22	22.8	38.1	19.0	48.2
UFC-M2008GG	20	1/2	7.0	30.16	31.75	26.0	44.2	19.0	54.3
UFC-M2208GG	22	1/2	7.0	30.16	31.75	26.0	44.2	19.0	54.3
Dimensions are for reference only and are subject to change without prior notice. E is minimum opening. F and L are typical finger tight.

How To Order

Fractional(Inch)Tube fittings

UNILOK fractional(inch) size tube fittings are ordered by part number as shown below.

Example: The following part number, UMC-0804N-SS, is designated for Male Connector, 1/2"OD x 1/4" Male NPT, 316SS.

U	FC	-	08	04	N	-	SS
UNILOK Tube Fittings	Fitting Type		Tube O.D.	Pipe Size	Thread Type		Material	NACE	Plating Only for Brass & Carbon Steel

Fractional(inch) Tube Designation

Tube O.D.

inch

1/16

1/8

3/16

1/4

5/16

3/8

1/2

5/8

3/4

7/8

1-1/8

1-1/4

1-1/2

1.50

3.17

4.76

6.35

7.93

9.52

12.70

15.88

19.05

22.22

25.40

28.57

31.75

38.10

50.80

Designator

Pipe Size Designation

Material Designation

Pipe Size

1/8

1/4

3/8

1/2

3/4

1-1/4

1-1/2

Designator

Materials

Designator

316SS

Brass

Thread Type Designation

Carbon Steel

Designator

Thread Type

Alloy 400

NPT

National Standard Pipe Thread

IN60

Alloy 600

ISO 7/1

Taper Pipe Thread

IN65

Alloy 625

ISO 228/1

Parallel Pipe Thread

IN85

Alloy 825

SAE J1926

Straight Thread Boss

Alloy C-276

SAE J514

37° Flared

PTFE

Tube End

Duplex

None

UNILOK Port

Super Duplex

6MO

6MO/SMO254

NACE Application

Plating Designation

None

Nickel

NACE Application

Black Phosporized

Metric Tube Fittings

UNILOK metric size tube fittings are ordered by part number as shown below.

Example: The following part number, UMC-M1204R-SS is designated for Male Connector, 12mmOD x 1/4" Male BSPT, 316SS.

U	FC	-	M12	04	R	-	SS
UNILOK Tube Fittings	Fitting Type		Tube O.D.	Pipe Size	Thread Type		Material	NACE	Plating Only for Brass & Carbon Steel
UNILOK Tube Fittings	Fitting Type		Tube O.D.	Pipe Size	Thread Type		Material	NACE	Plating Only for Brass & Carbon Steel

Metric Tube O.D Designation
Tube O.D.	mm	2	3	4	6	8	10	12	14	15	16	18	20	22	25	28	32	38
Designator		M02	M03	M04	M06	M08	M10	M12	M14	M15	M16	M18	M20	M22	M25	M28	M32	M38

Tubing & Pipe end Thread Information

Tubing Information

The proper selection of tubing is essential to assure maximum fitting reliability and performance. When choosing tubing material, size and wall thickness, consider system’s pressure, flow rate, temperature, environment and compatibility with great care.

Maximum Allowable Working Pressure

Stainless Steel Tubing

Fully annealed and seamless stainless steel tubing to comply with ASTM A269 or equivalent. Hardness should not exceed Rb 80. Tubing should be free from scratched and suitable for bending and flaring.

Fractional(Inch) Tubing
Tube O.D. (inch)	Tube Wall Thickness (inch)
Tube O.D. (inch)	0.028	0.035	0.049	0.065	0.083	0.095	0.109	0.120	0.134	0.156	0.188
1/8	8550	10950
3/16	5500	7100	10300
1/4	4100	5200	7600	10300				Working pressure in psig
5/16		4100	5900	8100
3/8		3350	4850	6550
1/2		2650	3750	5150	6750
5/8			2950	4050	5250	6050
3/4			2450	3350	4250	4950	5850
4/8			2050	2850	3650	4250	4850
1				2400	3100	3600	4200	4700
1-1/4					2400	2800	3300	3600	4100	4900
1-1/2						2300	2700	3000	3400	4000	4900
2							2000	2200	2500	2900	3600

Metric Tubing
Tube O.D. (inch)	Tube Wall Thickness (inch)
Tube O.D. (inch)	0.8	1.0	1.2	1.5	2.0	2.2	2.5	3.0	3.5	4.0	4.5
3	9700
4	7900	11500
6	4500	6100	7850	10300				Working pressure in psig
8		4500	5650	7500
10		3500	4350	5800	8400
12		2900	3600	4800	6800
14		2300	2900	4000	5500	6250
15		200	2750	3650	5200	5800
16			2450	3350	4800	5350	5800
18			2150	2950	4200	4650	5350
20			2030	2600	3750	4200	4800
22			1750	2300	3350	3750	4350
25					2900	3350	3750	4650
38						2030	2300	2900	3500	3900	4500
For gas service application, use only tubing with wall thickness on outside of gray areas. Allowable stress of 20000 psig between -29°C(-20°F) and 37°C(100°F) based on ultimate tensile strength to be 74000 psig.

Copper Tubing

Fully annealed and seamless stainless steel tubing to comply with ASTM B75 or equivalent. Hardness should not exceed Rb 60.

Fractional(Inch) Tubing

Tube O.D. (inch)	Tube Wall Thickness (inch)
Tube O.D. (inch)	0.028	0.035	0.049	0.065	0.083	0.095	0.109	0.120
1/4	1300	1600	2500	3500
3/8		1000	1600	2200
1/2		800	1100	1600	2200
5/8			900	1200	1600	1900
3/4			700	1000	1300	1500	1800
1			500	700	900	1100	1300	1500

Metric Tubing

Tube O.D. (inch)	Tube Wall Thickness (inch)
Tube O.D. (inch)	1.0	1.5	2.0	2.5	3.0
6	2350	3670
8	1710	2680	Working pressure in psig
10	1350	2090
12	1100	1710	2350
20		990	1350	1710
25		780	1060	1350	1640

For gas service application, use only tubing with wall thickness on outside of gray areas. Allowable stress of 6000 psig between -29℃(-20℉) and 37℃ (100℉) based on ultim ate tensile strength to be 30000 psig.

Monel Tubing

Fully annealed and seamless stainless steel tubing to comply with ASTM B165 or equivalent. Hardness should not exceed Rockwell Rb 75.

Fractional(Inch) Tubing

Tube O.D. (inch)	Tube Wall Thickness (inch)
Tube O.D. (inch)	0.035	0.049	0.065	0.083	0.095	0.109	0.120
1/4	4800	7000	9500
3/8	3100	4400	6100		Working pressure in psig
1/2	2300	3200	4400
3/4		2200	3000	4000	4600
1			2200	2900	3400	3900	4300

Determination Factors of MAWP at High Temperature Application

To determine allowable working pressure at elevated temperature, multiply allowable working pressure and factors which are shown in the table.

Temperature		Materials
℃	℉	316SS	Copper	Monel
90	194	1.0	0.8	0.88
200	392	0.96	0.5	0.79
310	590	0.85	-	0.79
480	802	0.79	-	0.75
536	996	0.76	-	-
644	1227	0.37	-	-

Example: 316SS Tubing, 1/2"ODx0.049"WT at 310℃ AWP: 3750 x 0.85 = 3187 psig.

* MAWP: Maximum Allowable Working Pressure

* AWP: Allowable Working Pressure

Pipe End Thread Information

The end connections with the lower pressure rating is the determining factor of pressure rating for the fittings with both UNILOK tube ends and pipe thread ends .

Pressure Rating for Pipe End Thread

Tapered Pipe Threads - NPT or ISO 7/1(BSPT) Allowable pressure ratings for male and female threads are based on ASME B31.3 at ambient temperature.									ISO 228/1 Parallel Thread (BSPP) The pressure ratings are at ambient temperature.

Pipe Size	316SS				316SS			UNILOK Desig nator	Male Pipe Size	316SS		UNILOK Designator
Pipe Size	Male		Female		Male	Female			Male Pipe Size	bar	psig	UNILOK Designator
inch	bar	psig	bar	psig	psig	bar	psig		1/8	315	4568	-02G
1/16	760	11000	460	6700	5500	230	3300	-01N/R	1/4	315	4568	-04G
1/8	690	10000	440	6500	5000	220	3200	-02N/R	3/8	315	4568	-06G
1/4	550	8000	450	6600	4000	220	3300	-04N/R	1/2	160	2320	-08G
3/8	540	7800	360	5300	3900	180	2600	-06N/R
1/2	530	7700	330	4900	3800	160	2400	-08N/R
3/4	500	7300	320	4600	3600	160	2300	-12N/R
1	370	5300	300	4400	2600	150	2200	-16N/R
1-1/4	410	6000	350	5000	3000	170	2500	-20N/R
1-1/2	340	5000	310	4600	2500	150	2300	-24N/R
2	270	3900	270	3900	1900	130	1900	-32N/R

O-Seal Fittings

Rated to 206 bar (3000 psig) for 316SS fittings up to 1 inch and 25mm

Kinds of Pipe End Thread

NPT Pipe Thread
NPT (National Pipe Thread) is based on ANSI B1.20.1.

ISO 7/1 Tapered Pipe Thread
International Organization for Standard (ISO 7/1) Tapered (PT) Equivalent to BSPT (British Standard Pipe Taper Thread), DIN 2999, JIS B0203

ISO 228/1 Parallel Pipe Thread
International Organization for Standard (ISO 228/1) Parallel(PF) Equivalent to BSPP (British Standard Pipe Parallel Thread), DIN ISO228/1, JIS B0202 Gasket or O-ring is normally used to seal into the parallel female threaded components.

Features

Gaugeability

UNILOK tube fittings are produced with exact and tight tolerances. Without such close tolerances, proper interaction among the nut, ferrules, and body would not occur.

Corrosion Resistance

UNILOK ferrules have the strongest corrosion resistance due to our own special hardening process.

This has been proven in various industrial areas over several decades.

Interchangeability

UNILOK tube fittings can be interchanged with tube fittings manufactured to international standards.

Less Torque and Anti-Distortion

When the nut is tightened, both ferrules are driven forward between the nut and the body.

This axial movement doesn't transfer any torque from the fitting to the tubing when the original tubing's mechanical properties are maintained.

UNILOK Tube Fittings Installation Instruction

Product

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