Features dual radial O-rings and a face seal O-ring
Includes PTFE locking cord and handles for secure attachment
The BlueRobotics 4-inch O-Ring Flange is designed to create a secure, high-pressure watertight interface between a tube and an end cap. This flange is compatible with both flat and dome end caps, and can also be utilized with custom-made end caps.
Constructed from anodized aluminum, the second-generation flanges incorporate dual radial O-rings and a face seal O-ring to ensure reliable high-pressure sealing. Additionally, they are equipped with a locking cord gland and an anti-rotation feature for enhanced stability and security.
The flange comes with a PTFE locking cord and handles, which are used to secure the flange to the tube. It is important to note that these flanges are specifically designed to be compatible with precision machined enclosure tubes.
The flange also features four internal mounting holes, which facilitate the secure attachment of internal contents. This particular feature is utilized in the BlueROV2 for the purpose of holding the electronics tray.
1x Flange 4-inch / 100 mm
1x Face Seal O-ring
2x Radial O-ring
1x PTFE Locking Cord
1x Locking Cord Handle and Set Screw
1x Single-use Packet of Molykote 111 Compound
Series Diameter: 100 mm / 4 inch
Flange OD (E): 114.3 ± 0.1 mm
Piston Diameter (F): 103.95 ± 0.05 mm
Piston Length (G): 19.1 ± 0.1 mm
Overall Length (H): 27.0.1 mm
Inner Mounting Hole Circle (J): 94.0.1 mm
Locking Cord Diameter (D): 2.6 ± 0.4 mm for all flange sizes
Inner Mounting Holes (I): M3x0.5 for all flange sizes
If you are not satisfied with a product purchased from the Site, you may request a return within 30 days from the delivery date, unless the product is listed under the Return Exceptions below or is subject to specific return conditions noted on the product page.
This return policy also applies, as a minimum standard, to products sold and fulfilled by third-party vendors through the Marketplace.
Returns under this policy concern non-defective products. In the case of a confirmed manufacturing defect, remedies are handled under the Warranty terms, at the Vendor's discretion. See the Warranty section.
Return Conditions
To qualify for a refund under the 30-day return policy, all of the following conditions must be met:
A valid Return Authorization (RA) number must be obtained prior to returning the product. Returns without an RA number will be refused.
The RA number is valid for 30 days. The returned item must be received within that period.
The RA number must be included with the return.
Products must be returned in unused, unmodified condition (e.g., no scratches, alterations, missing parts, or signs of installation/use) and in their original packaging, suitable for resale.
Shipping fees are non-refundable. Return shipping costs are the responsibility of the customer, except in cases of a product confirmed defective through RobotShop's troubleshooting process or of a verified shipping error by RobotShop.
Refunds are processed within 7 days after receipt and inspection of the returned item.
A $100 cleaning fee may apply to domestic robots returned in used or unclean condition.
A 20% restocking fee may apply to large-quantity returns of items ordered specifically for the customer from the manufacturer or not part of RobotShop's standard inventory.
Return Exceptions
The following products are not eligible for return or refund under this policy:
Used, damaged, or modified products — Items that show signs of use, wear, or alteration, making them unsuitable for resale.
Consumables — Use and wear-and-tear components, altered or depleted through use (e.g., batteries, belts, brushes, gears, filament, tires, disposable bags, lubricants, greases, waxes, etc.). Not eligible for return once opened or used.
Perishables — Goods liable to deteriorate or expire rapidly. Not eligible for return.
Sealed goods (health or hygiene) — Items sealed for health-protection or hygiene reasons (e.g., masks, gloves, odor-absorbing products). Not eligible for return once unsealed.
Build-it-yourself products and items requiring customer assembly — Including robots & kits, robot parts, and other products requiring assembly or soldering. Not eligible for return once assembled, soldered, or installed.
Digital Goods, Software, and Apps — Final sale only, due to licensing restrictions.
Clearance Items — Products identified as clearance or final sale, including end-of-life or discontinued items.
Custom-made, personalized, or special-order items — Products manufactured, configured, adapted, or built to the customer's own specifications and requirements.
On-Demand Items — Standard catalogue products not stocked by RobotShop and ordered specifically to fulfill a customer request.
While the same return policy applies, these orders require a separate contact process for returns.
RobotShop Fulfilled Orders → submit a support ticket from your account under My Support Tickets.
Marketplace Vendor Orders → submit a ticket from your account under My Marketplace Tickets to contact the vendor directly.
Note: Marketplace vendor products are normally labelled with SKUs starting with RM, and identified on the product page with the mention "Sold and fulfilled by [Vendor Name]".
