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

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Fisher Space Pen Cap-O-Matic 775G-Y Ballpoint Pen – Reliability in All Conditions

The Fisher Space Pen Cap-O-Matic, model 775G-Y, is a practical and durable pen with a brass cap and a yellow plastic barrel. Its one-handed activation makes it convenient for everyday use and in extreme situations.

Every pen in the series is precision-assembled and hand-tested. It comes with a lifetime warranty against manufacturing defects.

Who can benefit from this pen?

This model is suitable for a wide range of users:

Office staff and business professionals
Construction Workers and Tradespeople
Law enforcement agencies and the military
Firefighters and medical professionals
Outdoor enthusiasts and adventure seekers

Technical Specifications of the Pen

The design combines brass and steel. The magazine mouthpiece is made of tungsten carbide—a highly wear-resistant material.

The pen uses thixotropic ink—it is solid when not in use, but liquefies when writing. This means it doesn't leak or skip.

It lasts up to three times longer than regular ink
Operates at temperatures ranging from -34°C to +120°C
It writes underwater and in zero gravity
Works at any angle, including upside down

The cartridge contains a pressurized nitrogen gas cartridge. A small metal cylinder presses against the hermetically sealed ink, ensuring a steady flow while writing.

Comfort and Fit

Its compact size means the pen fits easily into a wallet or organizer. The clip makes it easy to attach to a pocket or backpack.

It doesn't run in the summer and doesn't freeze in the winter—it's reliable in all seasons.

A gift for a man and a woman with personality

This pen makes an excellent gift for people in various professions—teachers, doctors, lawyers, politicians, business leaders, police officers, and military personnel. It is practical, durable, and steeped in history.

It comes in a gift box, ready to give.

The Story Behind the Fisher Space Pen

During the early NASA missions, astronauts used mechanical pencils. For the Gemini project in 1965, NASA purchased 34 mechanical pencils at a total cost of $4,382.50—about $128.89 each. The expense sparked public outrage, and the agency began looking for alternatives.

Paul S. Fisher of Fisher Pen Co. developed a pen suitable for use in space. He did so without funding from NASA; the company invested about $1 million of its own funds.

In 1967, after rigorous testing, NASA equipped the Apollo astronauts with these pens. Approximately 400 were purchased at a price of $6 each. In February 1969, the Soviet Union also ordered 100 pens and 1,000 refills for the Soyuz missions—prior to that, their cosmonauts had written with pencils while in orbit.

To this day, American astronauts and Russian cosmonauts use Fisher Space Pens.

Features of the Fisher Space Pen Cap-O-Matic 775G-Y

Specifications	Value
Brand	Fisher Space Pen
Model	Cap-O-Matic 775G-Y
Length	13.7 cm
Housing Material	Plastic (yellow)
Cap Material	Brass
Construction and Coating	Brass and Steel
Magazine Nozzle	Tungsten carbide
Ink Type	Thixotropic
Ink Color	Black
Font Weight	Average
Magazine	Fisher SPR4
Compatible refills	SPR Cartridge Series
Clip	Yes
Operating temperature	-34°C to +120°C
Warranty	Life-long
Contents of the Set	Pen and Gift Box

Frequently Asked Questions

Can this pen write underwater?

Yes, the Fisher Space Pen Cap-O-Matic 775G-Y writes reliably underwater. The cartridge is hermetically sealed and contains a pressurized nitrogen gas cartridge that forces the ink toward the tip regardless of the environment. This makes it suitable for use in the rain, in humid conditions, or in direct contact with water.

At what temperatures does the Fisher Space Pen work?

The pen works at temperatures ranging from -34°C to +120°C. It does not freeze in cold weather and does not melt in hot weather. This makes it reliable in the field, in a car during the summer, or when working outdoors in the winter.

What type of cartridge does the 775G-Y model use?

The pen comes with a black Fisher SPR4 refill and a medium line width. It is compatible with all refills from Fisher Space Pen’s Cartridge SPR series. The refills can be easily replaced, which significantly extends the pen’s lifespan.

What is the warranty on the Fisher Space Pen Cap-O-Matic?

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

Is this pen a good gift?

Yes, the Fisher Space Pen Cap-O-Matic 775G-Y comes in a gift box and is ready to give. It’s suitable for men and women in various professions—doctors, lawyers, military personnel, police officers, teachers, business leaders, and high school seniors. It combines practicality, history, and unique technology, making it an interesting conversation starter. You can find it at a great price on Dulotec.COM.

How do you activate the Cap-O-Matic pen?

The Cap-O-Matic model is designed for one-handed operation. This makes it particularly convenient for people on the go, when working with gloves, or in situations where the other hand is occupied. It is precisely this feature that makes it the preferred choice among law enforcement officers, military personnel, firefighters, and medical professionals.

Have astronauts used Fisher Space Pens?

Yes. After NASA sought an alternative to the pencils used on early missions, Paul S. Fisher developed a ballpoint pen suitable for the space environment. In 1967, NASA equipped the Apollo astronauts with these pens. About 400 were purchased at a price of $6 each. In 1969, the Soviet Union also ordered 100 pens and 1,000 refills for the Soyuz missions. To this day, American and Russian cosmonauts use them in orbit.