Fisher Space Pen Cap-O-Matic with brass cap and green barrel, model 775G-GR, in a gift box

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The Fisher Space Pen Cap-O-Matic is a reliable, one-handed-activation pen—practical, durable, and suitable for everyday use. The 775G-GR model features an elegant brass cap and a green plastic barrel.

A pen that works in all conditions

Every pen in the Fisher Space Pen series is precision-assembled and hand-tested. The manufacturer offers a lifetime warranty against manufacturing defects.

It operates at temperatures ranging from -34°C to +120°C
It works underwater and in zero gravity
It writes at any angle, including upside down
The ink is thixotropic—solid when at rest, liquid when writing
It doesn't break or leak
It lasts up to three times longer than regular ink

Design and Technology of the Fisher Space Pen

The body is made of a combination of brass and steel, and the cartridge tip is made of tungsten carbide. The refill contains a pressurized nitrogen gas cartridge—a small metal cylinder that pushes the hermetically sealed ink, allowing for writing in all conditions.

The pen is compact and fits easily in a wallet or organizer. The clip secures it to a pocket or backpack.

Who is the Cap-O-Matic pen suitable for?

One-handed operation makes it convenient for a wide range of users:

Law enforcement officers, firefighters, and military personnel
Medical professionals and lawyers
People outdoors and construction crews
Anyone looking for a reliable writing tool

It doesn't melt in the summer or freeze in the winter—you can keep it in your car or everyday bag and count on it in any situation.

The Fisher Space Pen as a Gift for a Man

The model comes in a gift box and is an excellent gift choice for men and women in various professions. 🎁 It is suitable for doctors, business leaders, police officers, teachers, craftsmen, and high school seniors.

With their variety of styles and colors, Fisher Space Pen ballpoint pens make for a prestigious and practical gift with an interesting history. Discover the complete collection at Dulotec.COM.

The History of the Fisher Space Pen and NASA

During the early NASA missions, astronauts used mechanical pencils. For the Gemini program in 1965, 34 mechanical pencils were purchased for a total of $4,382.50—about $128.89 each. This caused public outcry, and NASA sought alternatives.

Paul S. Fisher of Fisher Pen Co. developed a pressurized-cartridge ballpoint pen entirely with private funds—about 1 million U.S. dollars—without any funding from NASA. The pen functioned in zero gravity, underwater, and at extreme temperatures. After being patented, the product was offered to NASA in 1965.

In 1967, after rigorous testing, NASA managers agreed to equip the Apollo program astronauts with these pens. Approximately 400 pens were purchased at a price of $6 each. In February 1969, the Soviet Union also purchased 100 pens and 1,000 refills for the Soyuz spaceflights—previously, their cosmonauts had used pencils. To this day, both American astronauts and Russian cosmonauts use Fisher pens.

Specifications	Value
Brand	Fisher Space Pen
Model	Cap-O-Matic 775G-GR
Body Color	Green
Cap Material	Brass
Housing Material	Plastic
Magazine Nozzle	Tungsten carbide
Length	13.7 cm
Mounting Bracket	Clip
Charger included	Fisher SPR4 – black, medium thickness
Compatible Refills	SPR Cartridge Series
Operating temperature	-34°C to +120°C
Warranty	Lifetime Warranty Against Manufacturing Defects
Contents of the Set	Pen and Gift Box

Frequently Asked Questions

How does the Fisher Space Pen Cap-O-Matic technology work?

The refill contains a pressurized nitrogen gas cartridge. A small metal cylinder pushes the special thixotropic ink, which is hermetically sealed. In its normal state, the ink is solid and only liquefies when writing. This is precisely why the pen does not skip, does not leak, and writes at any angle, including when held upside down.

At what temperatures does the Fisher Space Pen Cap-O-Matic work?

The Cap-O-Matic model operates reliably at temperatures ranging from -34°C to +120°C. This means it won’t freeze in the winter or run in the summer. You can use it in your car, outdoors, or in extreme work environments. The pen also writes underwater and in zero gravity.

What materials is the Cap-O-Matic 775G-GR pen made of?

The cap is made of brass, and the barrel is made of green plastic. The construction also includes steel. The refill tip is made of tungsten carbide—an extremely hard and durable material that ensures precise and smooth writing.

What is the warranty on Fisher Space Pen ballpoint pens?

Every Fisher Space Pen is precision-assembled and hand-tested. The manufacturer offers a lifetime warranty against all manufacturing defects. This is a clear indication of the product’s quality and reliability.

Which refill is compatible with the Cap-O-Matic 775 model?

The pen comes with a black Fisher SPR4 refill and a medium line width. Replacement cartridges from the Cartridge SPR series are compatible. The ink lasts up to 3 times longer than regular ink.

Is the Fisher Space Pen Cap-O-Matic a good gift?

Yes, the pen comes in a gift box and is an excellent gift choice for men and women in various professions. It’s suitable for doctors, lawyers, military personnel, police officers, firefighters, business leaders, teachers, craftsmen, and high school seniors. It combines practicality, durability, and an interesting history, making it an excellent conversation starter.

What is the history of the Fisher Space Pen and its connection to NASA?

Paul S. Fisher of Fisher Pen Co. developed the pressurized ballpoint pen entirely with private funds—about 1 million U.S. dollars—without any funding from NASA. In 1967, after rigorous testing, NASA equipped the Apollo program astronauts with these pens. About 400 were purchased at a price of $6 each. In February 1969, the Soviet Union also purchased 100 pens and 1,000 refills for use on Soyuz spaceflights. To this day, both American astronauts and Russian cosmonauts continue to use Fisher pens.