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CGA/DISS | 45 SERIES COMPLETE CONNECTORS (Nipple, Nut, Gasket and Blank Plug)
Ultra-High Integrity Services Connections, DISS, are used for connecting items of gas handling equipment (such as pressure regulators or pigtails) directly to the cylinder valve outlet of a semiconductor/high-purity gas cylinder. The 45 Series corresponds to the complete connectors including nipple, nut, gasket and bank plug.
Key advantages
  • 100% visual inspection of critical surfaces
  • Electropolished internally
  • Ultimate decontamination and packaged in certified clean room
  • Permanently marked
  • Manufactured according to CGA V-1 standards
  • Fits all local norms and standards
  • Non-rotating design provides leak tight makeup
  CGA/DISS Number End Connection Overall
Length (L)
Internal Surface
Finish μm (μ inch)
Nipple Material HEX Gasket Material HEX 2
SS 316L VAR Nickel PCTFE
45 632, 634, 636,
638, 640, 642
6** 1/4” Tube Weld* 4BW 3 - 3/8” Ra 0.2 (8 Ra) EP •  S V 1 - 1/4” NI •  PC 1 - 1/8”
1/4” Face Seal Male 4FS 3 - 7/8”  Ra 0.2 (8 Ra) EP •  • 
1/4” NPT Male 4N 3 - 7/8” Ra 0.4 (16 Ra) EP • 
45 712, 714, 716,
718, 720, 722,
724, 726, 728
7** 1/4” Tube Weld*  4BW 3 - 3/8” Ra 0.2 (8 Ra) EP •  S V 1 - 3/8” NI •  PC 1 - 1/4”
1/4” Face Seal Male 4FS 3 - 7/8” Ra 0.2 (8 Ra) EP •  • 
1/4” NPT Male 4N 3 - 7/8” Ra 0.4 (16 Ra) EP • 
Dimensional drawings
Drawing
Downloadable catalogs, brochures
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    UHP Cylinder connectors
    Last update: May 17, 2021
    Available in: en/cn
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