Union Connector

Straight configuration, tube fitting, tube adaptor / Everfit Technology CO., LTD. (EFT) is a vacuum component, vacuum fitting, processing equipment and system provider with almost 50 years of experience.

Tube fitting, straight connector
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Union Connector

U Series

Two-ferrule design, material can be stainless 316L or 316Ti (DIN 1.4571).

Straight configuration, tube fitting, tube adaptor

For Metric Tubes

T TUBE OD PART NO. DIMENSION 
A D E F G H
3 U3M 35.5 12.9 2.5 10 10 22.1
4 U4M 37.5 13.7 2.5 12 12 24.1
6 U6M 41.0 15.3 5.0 12 9/16 26.2
8 U8M 43.5 16.2 6.0 14 5/8 28.2
10 U10M 46.5 17.2 8.0 17 19 31.0
12 U12M 51.5 22.8 10.0 20 7/8 31.0
14 U14M 53.0 24.4 12.0 24 25 32.0
15 U15M 52.0 24.4 12.0 24 25 31.8
16 U16M 52.0 24.4 12.0 24 25 31.8
18 U18M 54.0 24.4 16.0 27 30 33.0
20 U20M 52.0 26.0 18.0 30 32 34.0
22 U22M 53.0 26.0 18.0 30 32 34.0
25 U25M 65.0 31.3 22.0 35 1-1/2 40.0

For Fractional Tubes

T TUBE OD PART NO. DIMENSION 
A D E F G H
1/16 U1 28.0 8.6 1.3 10 10 20.0
1/8 U2 36.0 12.7 2.5 12 7/16 22.4
3/16 U3 38.0 13.7 2.5 12 12 24.0
1/4 U4 41.0 15.2 5.0 12 9/16 26.2
3/8 U6 45.0 16.8 8.0 16 11 /16 30.2
1/2 U8 51.5 22.9 10.0 20 7/8 31.0
5/8 U10 53.0 24.4 14.0 24 25 32.0
3/4 U12 54.0 24.4 16.0 27 1-1/8 35.0
1 U16 65.0 31.2 22.0 35 1-1/2 40.4
  • The A and D dimensions are in finger-tight.
  • The E dimension is the minimum nominal opening. These fittings may have a larger opening at connection end.
  • Fraction numbers are in inch size; the others are in mm size.
  • Dimensions are for reference only, and are subject to change without notice.

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Vacuum Component | Union Connector Manufacturer - EFT

Based in Taiwan, EVERFIT TECHNOLOGY CO., LTD. is a Union Connector | vacuum component supplier for various industries, including semi-conductor, pharmaceutical, bio-technology, cosmetics, food processing and structural engineering. Main product: 316Ti Stainless steel pipe, progressing cavity pump part, pipe tee fitting, valve actuator component, diaphragm valve, ferrule, KF flange, etc.

5,500 square meter plant, cleanroom (class 10,000) and ultra-pure water system to deliver the cleanest pipe fittings. Between the robot arm and adjustment of fixture and jig, EFT is moving toward to becoming a manufacturer of pipe fittings with high technology.

EFT has been offering customers high-quality stainless steel vacuum components since 1976, both with advanced technology and 47 years of experience, EFT ensures each customer's demands are met.

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