Watertight Enclosure End Caps, Domes, and Flange Caps

$14.00 – $52.00

End caps and flange caps for the 2″, 3″, and 4″ Series Watertight Enclosures. These are the second generation of these end caps and flange caps with precision machined O-ring interfaces, a locking cord, anti-rotation feature, and optional M10 holes for cable penetrators. Rated to depths up to 950 meters.

If you’re looking for a complete underwater enclosure, check out the Watertight Enclosure Configuration page.

SKU: WTE-END-CAP-VP
HS Code: 3923.50.00

Product Description

A variety of end cap and flange cap options for the 2″, 3″, or 4″ Series Watertight Enclosures allow you to customize your enclosure for your application. End caps require an O-ring sealing flange to be installed on the enclosure and flange caps have the O-ring sealing flange built-in so that one is not necessary.

The clear acrylic end cap and dome end cap offer optically clear ports for cameras, lights, and other applications where optical clarity is important. They install to the O-ring sealing flange with six included screws.

The flange caps are anodized aluminum and include the same features as the O-ring sealing flange including dual radial O-rings for reliable high-pressure sealing, a locking cord gland, and an anti-rotation feature. The flange caps are available with a solid blank end, which can be machined with custom hole patterns, as well as M10 threaded holes for our cable penetrators. The flange caps do not require any screws, eliminating the need for stainless steel near the enclosures and preventing galvanic corrosion.

The end caps and flange caps are available individually here, but you can configure a complete watertight enclosure from the watertight enclosure configuration page.

Tube and flange with the locking cord installed.

Product Description

A variety of end cap and flange cap options for the 2″, 3″, or 4″ Series Watertight Enclosures allow you to customize your enclosure for your application. End caps require an O-ring sealing flange to be installed on the enclosure and flange caps have the O-ring sealing flange built-in so that one is not necessary.

The clear acrylic end cap and dome end cap offer optically clear ports for cameras, lights, and other applications where optical clarity is important. They install to the O-ring sealing flange with six included screws.

The flange caps are anodized aluminum and include the same features as the O-ring sealing flange including dual radial O-rings for reliable high-pressure sealing, a locking cord gland, and an anti-rotation feature. The flange caps are available with a solid blank end, which can be machined with custom hole patterns, as well as M10 threaded holes for our cable penetrators. The flange caps do not require any screws, eliminating the need for stainless steel near the enclosures and preventing galvanic corrosion.

The end caps and flange caps are available individually here, but you can configure a complete watertight enclosure from the watertight enclosure configuration page.

Tube and flange with the locking cord installed.
CAD models are of the 3″ Series end caps.

End Caps

  • 1 x End Cap (based on selection)
  • 6 x Socket Head Cap Screw (see technical details for size)

Domes

  • 1 x Dome and Retaining Ring (based on selection)
  • 6 x Socket Head Cap Screw (see technical details for size)

Flange Caps

  • 1 x Flange Cap (based on selection)
  • 2 x Radial O-ring
  • 1 x PTFE Locking Cord
  • 1 x Locking Cord Handle and Set Screw
  • 1 x Single-use Packet of Molykote 111 Compound

Specifications

End Caps

Series DiameterMaterialHole ConfigurationEnd Cap ScrewsEnd Cap Screw Hole Circle (K)Thickness¹ (L)WeightDepth RatingPart Number
50 mm
(2")		Cast AcrylicBlank (No holes)M2x0.4-10Ø50.8 ± 0.1 mm6.4 mm17 g600 m*BR-100094
75 mm
(3")		Cast AcrylicBlank (No holes)M3x0.5-12Ø82.6 ± 0.1 mm9 mm58 g400 m*BR-100630
6061-T6 Aluminum, Type II AnodizedBlank (No holes)Ø82.6 ± 0.1 mm6 mm102 g950 mBR-100949-999
4x M10 Thru6 mm97 gBR-100949-004
7x M10 Thru6 mm93 gBR-100949-007
100 mm
(4")		Cast AcrylicBlank (No holes)M3x0.5-16Ø108.0 ± 0.1 mm12.7 mm135 g500 m*BR-100061
6061-T6 Aluminum, Type II AnodizedBlank (No holes)M3x0.5-1210 mm234 g950 mBR-100184
5x M10 Thru6 mm162 g500 mWTE4-M-END-CAP-5-HOLE
10x M10 Thru10 mm212 g950 mBR-100170
14x M10 Thru6 mm149 g500 mWTE4-M-END-CAP-14-HOLE
7x M10 Thru
11x M10x1.5 Threaded		10 mm197 g950 mBR-101113
1x M10 Thru
4x M14 Thru		10 mm215 g950 mBR-100138
2x M10 Thru
8x M14 Thru		10 mm195 g950 mBR-100066
5x M10 Thru
2x M10x1.5 Threaded
8x M14x1.5 Threaded		10 mm188 g950 mBR-100151
¹ Overall thickness tolerance ± 0.1 mm.
* The depth ratings for cast acrylic components are applicable only for short-term submersions lasting less than two weeks. For longer submersion, we suggest using aluminum components only.

Domes

Series DiameterMaterialDome Internal Radius (M)Dome Wall Thickness (N)ScrewsWeightDepth Rating¹Part Number
50 mm (2")Acrylic dome, polycarbonate retaining ring18.0 ± 0.1 mm2.50 ± 0.10 mmM2x0.4-1015 g950 mBR-100859
75 mm (3")31.25 ± 0.10 mm3.1 ± 0.1 mmM3x0.5-1239 g750 mBR-101059
100 mm (4")43.5 ± 0.1 mm3.75 ± 0.10 mmM3x0.5-1281 g500 mBR-100495
¹ The depth ratings for cast acrylic components are applicable only for short-term submersions lasting less than two weeks. For longer submersion, we suggest using aluminum components only.

Flange Caps

Series DiameterHole ConfigurationWeightDepth RatingRadial Seal O-ringFlange OD (E)Piston Diameter (F)Piston Length (G)Overall Length (H)Inner Mounting Hole Circle (J)Part Number
50 mm (2")Blank (No holes)61 g950 m-030
Buna-N 70A		58.0 ± 0.1 mm50.95 ± 0.05 mm15.5 ± 0.1 mm21.5 ± 0.1 mm43.0 ± 0.1 mmBR-100276-999
2x M10 Thru58 gBR-100276-002
4x M10x1.5 Threaded63 gBR-100276-004
Locking Cord Diameter (D): 2.6 ± 0.4 mm for all flange caps
Inner Mounting Holes (I): M3x0.5 for all flange caps

3D Models

2" Series

WTE2-P-END-CAP-R2 (.zip)

WTE2-M-LOCKING-FLANGE-CAP-BLANK-R1 (.zip)

WTE2-M-LOCKING-FLANGE-CAP-2-HOLE-R1 (.zip)

WTE2-M-LOCKING-FLANGE-CAP-4-HOLE-R1 (.zip)

WTE2-P-DOME-R1 (.zip)

WTE2-P-RETAINING-RING-R1 (.zip)

3" Series

WTE3-P-END-CAP-R1 (.zip)

WTE3-M-END-CAP-R1 (.zip)

WTE3-M-END-CAP-4-HOLE-R1 (.zip)

WTE3-M-END-CAP-7-HOLE-R1 (.zip)

WTE3-P-DOME-R1 (.zip)

WTE3-P-RETAINING-RING-R1 (.zip)

4" Series

WTE4-P-END-CAP-BLANK-R1 (.zip)

WTE4-M-END-CAP-BLANK-R2 (.zip)

WTE4-M-END-CAP-5-HOLE-R1 (.zip)

WTE4-M-END-CAP-10XM10-R2 (.zip)

WTE4-M-END-CAP-14-HOLE-R1 (.zip)

WTE4-M-END-CAP-18XM10-R2 (.zip)

WTE4-M-END-CAP-4XM14-1XM10-R1 (.zip)

WTE4-M-END-CAP-8XM14-2XM10-R1 (.zip)

WTE4-M-END-CAP-8XM14-7XM10-R1 (.zip)

WTE4-P-DOME-R4 (.zip)

WTE4-P-DOME-RETAINING-RING-R1 (.zip)

Revision History

14 July 2023

  • WTE4-M-END-CAP-4XM14-1XM10-R1-RP SKU changed to BR-100138
  • WTE4-M-END-CAP-8XM14-2XM10-R1-RP SKU changed to BR-100066
  • WTE4-M-END-CAP-8XM14-7XM10-R1-RP SKU changed to BR-100151

14 June 2023

  • WTE4-P-END-CAP-BLANK-R1 SKU changed to BR-100061
  • WTE4-P-DOME-R4-RP SKU changed to BR-100495
  • WTE4-M-END-CAP-BLANK-R2-RP SKU changed to BR-100184
  • WTE4-M-END-CAP-10XM10-R2-RP SKU changed to BR-100170
  • WTE4-M-END-CAP-18XM10-R2-RP SKU changed to BR-101113

8 June 2023

  • WTE3-P-END-CAP-R1-RP SKU changed to BR-100630
  • WTE3-P-DOME-R1-RP SKU changed to BR-101059
  • WTE3-M-END-CAP-R1-RP SKU changed to BR-100949-999
  • WTE3-M-END-CAP-4-HOLE-R1-RP SKU changed to BR-100949-004
  • WTE3-M-END-CAP-7-HOLE-R1-RP SKU changed to BR-100949-007

1 June 2023

  • WTE2-P-END-CAP-R2-RP SKU changed to BR-100094
  • WTE2-P-DOME-R1-RP SKU changed to BR-100859

1 June 2023

  • WTE2-M-LOCKING-FLANGE-CAP-BLANK-R2-RP SKU changed to BR-100276-999
  • WTE2-M-LOCKING-FLANGE-CAP-2-HOLE-R2-RP SKU changed to BR-100276-002
  • WTE2-M-LOCKING-FLANGE-CAP-4-HOLE-R2-RP SKU changed to BR-100276-004

10 March 2023

  • WTE4-M-END-CAP-BLANK-R2 - Initial release
    • Redesigned for increased depth rating

27 February 2023

  • WTE4-M-END-CAP-10XM10-R2 - Initial release
    • Redesigned for increased depth rating

20 December 2022

  • WTE4-M-END-CAP-4XM14-1XM10-R1 - Initial release
  • WTE4-M-END-CAP-8XM14-2XM10-R1 - Initial release
  • WTE4-M-END-CAP-8XM14-7XM10-R1 - Initial release
  • WTE4-P-END-CAP-R1 - Minor revision
    • SKU changed to WTE4-P-END-CAP-BLANK-R1

29 November 2022

  • WTE4-M-END-CAP-18-HOLE-R2 - Minor revision
  • SKU changed to WTE4-M-END-CAP-18XM10-R2

19 November 2019

  • WTE2-M-LOCKING-FLANGE-CAP-BLANK-R1 - Initial release
  • WTE2-M-LOCKING-FLANGE-CAP-2-HOLE-R1 - Initial release
  • WTE2-M-LOCKING-FLANGE-CAP-4-HOLE-R1 - Initial release
  • WTE2-P-END-CAP-R2 - Initial release
  • WTE2-P-DOME-R1 - Initial release

13 November 2018

  • WTE4-M-END-CAP-18-HOLE-R2 - Initial release

20 April 2018

  • WTE4-P-DOME-R4 - Initial release

27 December 2017

  • WTE3-P-DOME-R1 - Initial release

28 December 2016

  • WTE4-M-END-CAP-5-HOLE-R1 - Initial release
  • WTE3-M-END-CAP-7-HOLE-R1 - Initial release

17 March 2016

  • WTE3-M-END-CAP-4-HOLE-R1 - Initial release
  • WTE3-M-END-CAP-R1 - Initial release

29 Jan 2016

  • WTE4-M-END-CAP-14-HOLE-R1 - Initial release

13 November 2015

  • WTE4-M-END-CAP-R1 - Initial release

24 September 2015

  • WTE3-P-END-CAP-R1 - Initial release

1 September 2015

  • WTE4-M-END-CAP-10-HOLE-R1 - Initial release

31 March 2015

  • WTE4-P-END-CAP-R1 - Initial release
Watertight Enclosure (WTE) User Guide
Learn how to assemble and use a Watertight Enclosure!
Using the Vacuum Plug and Hand Pump
Ensure the O-ring seals are good on our WTE with this quick test!

Support

Blue Robotics Forums – Watertight Enclosures

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