on saleDiplomat Nexus Fountain Pen - Blue/Gold

Product Code DP-D40504011

In Stock

out of stock

on saleDiplomat Nexus Fountain Pen - Blue/Gold

Product Code DP-D40504011

In Stock

out of stock

The patented closing sealing system on the Diplomat Nexus fountain pen eliminates the risk of ink leaking into your cap when not in use!

Product Highlights:
  • • Blue anodized aluminum barrel and cap
  • • Smooth-writing JoWo #6 14k gold nib
  • • Large ink capacity
  • • Bottle of ink included
  • Read More

    MSRP $795.00

    Black/Gold Black/Silver Blue/Gold Blue/Silver

    Not sure which size nib is best for you?

    Try our Nib Nook tool to view and compare nib widths using our writing samples. Learn more ›

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    To celebrate the brand's 100th anniversary, Diplomat has drawn inspiration from both the past and the future for its new fountain pen: Nexus.

    Based on piston technology, an invention described by pen enthusiasts as revolutionary at the start of the 20th century, but combining it with a new patented sealing system by securely sealing the cap, Nexus combines the best of yesterday and tomorrow. No more risk of running out of ink; no more cartridges and their plastic packaging.

    This blue anodized aluminum fountain pen is accompanied by gold-plated trim. It has an ink window in the barrel so you can visibly see your remaining ink level. This pen is equipped with a smooth-writing #6 size two-tone 14k nib made by JoWo.

    To fill this pen, hold it with the nib facing upwards. Simply unscrew the barrel from the nib/grip section, fill the barrel with your preferred bottled ink using the included eyedropper or an ink syringe, and screw the nib/grip section back on.

    The patented automatic closing sealing system works by screwing on the cap, which activates a secure seal. No more risk of ink leaking into your cap when not in use!

    Thanks to its unique characteristics - a proven seal, no risk of leakage even on an airplane, a large ink capacity, ease of use, and perfect fluidity of writing - Nexus offers a reassuring and infinite writing experience.

    A bottle of blue Diplomat ink is included.

    Fountain Pens

    Whether or not the barrel of the pen is translucent, allowing you to see the ink and filling mechanism inside.

    Body Material
    Cap Rotations

    For pens with a screw-cap closure, how many rotations it takes to uncap/recap the pen.

    Cap Type

    How the cap is opened/closed from the barrel of the pen. Some common options include Snap-Cap, Screw-Cap, Magnetic Cap, or Capless (no cap).

    Compatible inks & refills

    Which ink this pen will accept. Choices include bottled ink and various styles of pre-filled ink cartridges.

    Bottled Inks
    Filling Mechanism

    How the pen fills with ink. Click here to watch our video tutorial on common filling mechanisms.

    Grip Material
    Nib Size
    Extra-Fine, Fine, Medium, Broad
    Nib Color
    Nib Material
    14k Gold

    Whether or not the cap fits securely onto the back of the barrel when open.


    Whether or not the nib/tip can retract into the body of the pen (usually for click or twist-open style pens).

    Diameter - Body
    13.7mm (0.54in)
    Diameter - Cap (without clip)
    14.9mm (0.59in)
    Diameter - Cap (with clip)
    18.0mm (0.71in)
    Diameter - Grip (mm)

    Measured from the place most people choose to rest their fingers, which varies with each pen.

    Length - Body

    The measurement from the back end of the barrel to the tip of the nib.

    138.6mm (5.46in)
    Length - Cap
    67.3mm (2.65in)
    Length - Nib

    The measured length of the visible portion of the nib when it is installed in the pen, from grip to tip.

    22.0mm (0.87in)
    Length - Overall (Closed)
    145.5mm (5.73in)
    Weight - Body

    If a converter is included with the pen, this weight is reflected in the total.

    39g (1.38oz)
    Weight - Cap
    19g (0.67oz)
    Weight - Overall (g)
    Max Ink Capacity - Eyedropper

    The maximum volume of ink that can fit in the pen when filling the entire barrel of the pen via eyedropper.




    How do I fill a fountain pen with ink?

    It depends on the pen's filling mechanism, which you can find in the Technical Specs section above.

    Here's a quick definition of the most common filling mechanisms:

    Cartridge - A small, disposable, sealed plastic reservoir that holds fountain pen ink. These come pre-filled with ink, and typically you just push to insert them into place and you'll be ready to write!

    Converter - A detachable and refillable ink reservoir that allows you to use bottled ink in a cartridge-accepting pen. Typically you will install the converter into the grip section, dip the nib/feed into the ink, and twist or pull the converter knob to draw ink into the converter. Here's a video for how to fill a cartridge/converter pen using a LAMY pen as an example.

    Eyedropper - A pen that utilizes the entire barrel as a reservoir for ink. Ink is directly filled into the barrel, allowing for a high ink capacity. Here's a video on how to do it!

    Piston - A type of filling system that uses a retracting plunger inside a sealed tube to draw ink into a pen. They are typically either twist or push-operated. These pens cannot accept cartridges or a converter, and only fill from bottled ink.

    Vacuum - A push-style piston that uses pressure to fill the large pen body with ink. They seal the ink chamber when closed, making it ideal for flying without risk of leaking.

    You can learn more with our Fountain Pen 101 video on Filling Mechanisms on YouTube.

    How do I clean a fountain pen?

    It depends on the filling mechanism, but it mostly comes down to flushing it out with water, and sometimes a little bit of Pen Flush if the ink is really stuck.

    It's a bit easier to show than to tell, so we've put together a few quick videos showing you the process:

    How to Clean a Cartridge/Converter Pen

    How to Clean an Eyedropper Pen

    How to Clean a Piston Pen

    How often do I need to clean my fountain pen?

    We recommend a good cleaning every 2 weeks, and any time you change ink colors.

    Water will usually do the trick, but we recommend you use our Goulet Pen Flush if the ink has been left in the pen for a while and could have dried up, or when you’re switching ink colors.

    My pen won’t write! What do I do?

    First things first... make sure you have ink in the pen! Be sure that the ink cartridge or converter is seated properly in the pen, and that you aren't out of ink.

    We always recommend you give your pen a good cleaning first, using our Goulet Pen Flush, or a drop of dish soap in some water. New pens often have some machining oil residue left in the feed, so a good cleaning often does the trick first.

    If that still doesn't work, try priming the feed. This consists of either dipping your pen nib and feed in ink, or forcing ink from the converter down into the feed.

    If it’s still not working after that, please reach out to us so we can help!

    What’s your return policy?

    You can submit a return request within 60 days of your order date. You can read all our Return Policies here.

    To initiate a return, please submit a request at the Return Portal. Our Customer Care team might reach out to you for more information.