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🖋️ Write like a space explorer—anywhere, anytime, no excuses.
The Fisher Space Pen Military Cap-O-Matic is a precision-engineered, pressurized ballpoint pen that writes smoothly in zero gravity, extreme temperatures (-30°F to 250°F), and underwater. Featuring single-hand activation, a durable matte black finish, and a lifetime warranty, this USA-made pen is trusted by astronauts, engineers, and outdoor professionals for reliable, versatile writing in any environment.









| Additional Features | Waterproof |
| Age Range Description | Adult |
| Asin | B001E103CY |
| Best Sellers Rank | #9,041 in Office Products (See Top 100 in Office Products) #186 in Ballpoint Pens |
| Body Shape | Round |
| Brand Name | Fisher |
| Closure Type | Snap |
| Color | Matte Black |
| Customer Reviews | 4.6 4.6 out of 5 stars (5,599) 4.6 out of 5 stars |
| Drill Point | Medium |
| Global Trade Identification Number | 00747609542448 |
| Grip Type | Contoured |
| Hand Orientation | Ambidextrous |
| Hardness | B |
| Included Components | Ink Cartridge |
| Ink Color | Black |
| Item Diameter | 0.38 inches |
| Item Dimensions | 5.2 x 0.5 x 0.5 inches |
| Item Weight | 9.07 g |
| Line Size | 1.1 millimeters |
| Manufacturer | Fisher Space Pen |
| Material Type | Alloy Steel, Brass, Tungsten Carbide |
| Model Name | 9004518 |
| Model Number | M4B |
| Recommended Uses For Product | Writing |
| Style | Gift Box |
| Unit Count | 1 Count |
| Warranty Description | Lifetime |
| Water Resistance Level | Waterproof |
| Writing Instrument Form | Ballpoint Pen |
User
Nice item, holds up well.
I really like these brass space pens. Better value than the chrome plated version IMO. I have two, use them daily. Comfortable, writes on most any surface, writes on vertical surfaces. Cartridges last quite a while.
User
BEAUTIFUL RAW BRASS PEN
Just got this in the mail today! I can’t speak of longevity of it . However I can give you my initial thoughts.. great presentation packaging! Upon opening the RAW BRASS pops , absolutely beautiful pen!I have it here in the video next to my solid brass zippo for “somewhat of a comparison”The construction of pen seems to be of great quality! Although it is a little lighter than I thought it would be .. not necessarily a bad thing . I would say weight is good! It screws on and off to get to the refill with no hesitation. Clicking the top part of pen does not feel mushy as some others have said .. I clicked it in my video and you can see and hear the responsiveness of it .Writes very nicely! No complaints here! I would buy again and recommend to a friend! I will update as I use it more! Please note I’m a truck driver / laborer and very very hard on my pens.. I will update!
User
Great Pen!
These pens work great! Highly recommend...
User
Solid pen. Wish it clicked nicer
Sturdy? Yes. Reliable? Yes. But I have two issues with this pen.1) I hate the click mechanism because if you grip too high up the pen you will compress the spring while writing. Now, I don't always write like that but when I'm using a pen to quickly jot notes, sometimes I don't grip it as properly and so this becomes annoying. The click is also rather unsatisfying so if you wanna fidget with this pen your best bet is unscrewing and rescrewing the body of the pen, because the click is kinda disappointing.2) I don't trust this pen. I have yet to have a leak in my pocket, but because of the nature of the design of this pen I'm worried it'll get clicked open when I put the pocket clip on my pants pocket and an hour later I'll discover a mess. I've yet to have that issue, but a traditional click pen design would seem more trustworthy. I don't like that the pocket clip is on the moving part of the pen.Overall? Solid pen. Has always written reliably when I need it. The body of the pen has a satisfying weight and the threads are neatly cut and it screws together very precisely. It's a rather small pen so if you have a big hands that might be an issue but if you want a small pen? This is a great inexpensive option. This has become my new edc pen and goes everywhere with me. I don't know if it's fair to call it a "tactical" pen because it doesn't have much grip and there's no fixed point to use for self defense, but I'm confident that the metal body of this pen is at least sturdy enough to push into someone's pressure point, should I be forced into a situation where I had to use it for self defense. But if you want a pen that definitely fit for self defense don't get this, but this might be better than defending yourself with your bare hands.All in all, a solidly built reliable pen.
User
great pen nice looking
Great high school graduation present
User
Pen Review
Pen arrived too late for Christmas even though I ordered it the first of Dec.Overall the pen is exactly as pictured. It writes great and can write on a variety of surfaces. The quality is great- it’s heavier than I thought it would be. The size is a like a regular pen and fits nicely in my pocketbook.
User
Bought pen. Received tank.
So I have never really been too picky about pens, but that was until I started flight school and university. There's a lot of pens out there that just can't take the pressure shock of climbing several thousand feet in a few minutes without leaking or failing in some other way, but this is not one of them. I was attracted to this pen by the fact that it is capable of writing in a vacuum, and in zero G, my assumption being that it would tolerate what some pens wouldn't, but by god does it go beyond that.This pen is built like a tank. You could probably run over it with one and it would look factory new. The difference in diameter between the exterior of the pen and the cartridge tells you everything you need to know about how much material is in the casing of this thing. This may lead you to think it would feel bulky in the hand, but the truth is, it really doesn't. As a matter of fact, it's actually one of the most comfortable pens I've ever used, and the tapered front end actually extends beyond aesthetics into ergonomics. It's capable of writing very quickly, and unlike some gel pens, it doesn't have that sticky feeling that accompanies cheap ballpoints. This thing will just go, and go, and go until you run it out of ink, which could take a while going on the size of the cartridge.The cartridge deploys with a light but satisfying click, and is very easy to replace. The matte black finish is nice for those that just want a solid, nondescript, tank of a pen, and there are no identifying markings on the exterior of the pen. As long as they keep making the cartridges, this will continue to be my pen of choice, even for day-to-day applications.
User
Great pen. Nothing fancy, it's just that good.
I have quite a few pens that are compatible with the space pen cartridges, but I prefer this design.What is it that makes it so special? Well, I'll argue that what makes this pen so great is what it isn't.1. It isn't a fisher bullet pen. At much as I love the compact streamlined design of the bullet type, I also hate it because it's small and has no clip so it gets lost easily.2. It's not some GI Joe "tacti-cool" pen garbage. Worst cool kid trend since the yo-yo and the fidget spinner. Seems like every joker with $25 bucks and no self control has one. They're heavy, they have large clips that get caught on things and bend out of shape, many have screw on caps that just make no sense at all, and their full of useless features like bottle openers and pressure point tips (as if stabbing someone with a pen would be hard without it.)What makes this pen great is that it's light weight but durable. I don't have to unscrew it to use it. It has a low profile clip that doesn't get caught on anything or bent. And it writes well. Best pen for the outdoorsmen, soldier, sailor, student. It's just a good all around pen.I recommend the fine point refills, the medium points are a little too bold for most of my uses.
User
Five Stars
Great pen.
User
Schreibt immer und überall
Ich bin schon Besitzer eines 40 Jahre alten AG7.Den hatte ich mit bei der Bundeswehr und ich muss sagen, der schreibt immer . Es gab kein Material, auf dem der nicht geschrieben hat, bei jedem Wetter.Leider hat er am Schaft wo die Verschraubung ist einen Riss bekommen.Jetzt kommt der Clou: Lebenslange Garantie! Gegoogelt und es gibt weltweit Vertragspartner.Habe den für Deutschland angerufen und man fragte mich nach dem Modell. AG7 sagte ich.Kein Problem, schicken sie und den defekten SpacePen und sie erhalten einen Neuen!!!Zuvor hatte ich mir aber schon den Space Pen M4 Gap O Matic hier gekauft.Der ist schlicht und gut verarbeitet. Aber der Knackpunkt ist: Der schreibt, wenn man ihn braucht.IMMER, solange die Mine voll ist.So Sätze wie: Booo Ey, der Sche..... Kuli schreibt wieder nicht, gibt es nicht mehr. Normal sollte man sie 10 Stück davon kaufen und überall einen liegen haben.So, viel Spaß damit
User
il y a un défaut
Le problème est que la circonférence du capuchon n'est pas ébavurée:elle est tranchante si on ne fait pas attention un vrai défaut de conception.
User
Fantastic service, arrived quick and safely
Fantastic service, arrived quick and safely. Perfect gift for my Dad's 70th birthday. My dad loved it. Thank you.
User
デザインが良い
使いやすい
Trustpilot
2 months ago
2 months ago