Q: Can this be refilled with "Fisher Space Pen" Ink

Yes. I just tried 2 of them 11/30/2019 and the Space pen fine point fits with NO modifications. The refills are about $5 a piece now. https://smile.amazon.com/gp/product/B007AIP8G6/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1

Q: Is there a 0.5 mm version of this pencil?

Technically, no, but there is a way to modify the M-701 to become a 0.5 lead mech pencil.It's essentially taking the interior of a M-402 mech pencil (which houses 0.5mm lead) and swapping the interior with that of a M-701. (you can also swap the pocket clip from the m-402 to the m-701 as well as people prefer the one on the m-402.)Your end results will be a M-701 mechanical pencil with 0.5mm lead in a sleek body that has great balanced weight, as well as a M-402 with 0.7mm lead and can be used as a backup. The internals for both pencils are the same.

Question 1

I've done Amazon searches for the lead refills, but there aren't any results. How then do I refill the Zebra M-701 Mechanical Pencil?

Accepted Answer

Just .7mm lead.  Take off the top metallic cap (slides off), pull out the tiny eraser (white, too small to uses consistently), and slide the lead in through the top like most other mechanical pencils.  Replace the eraser, then the cap, and presto, a fully functional mechanical pencil again.Something like the "Pentel Super Hi-Polymer Lead Refill , 0.7 mm Medium, HB, 90 Pieces of Lead (C27BPHB3-K6)" <--(copy this into the search bar at the top of the amazon page) sold right here on Amazon.com should suffice.  Also, I'm curious;  you said you did "Amazon searches for the lead refills, but there aren't any results." and then asked "How then do I refill the Zebra M-701 Mechanical Pencil?".  Does this mean you do not know how to replace the lead in the pencil, or that you could not find the "Zebra" branded lead for sale at Amazon.com?  Amazon does not sell Zebra branded lead, but the Pentel lead I pointed you in the direction of should satisfy your lead needs for this pencil, or any other pencil that requires .7mm lead (most commonly available lead refil out on the market, typically, besides .5mm)

Question 2

Can this be refilled with "Fisher Space Pen" Ink

Accepted Answer

Yes. I just tried 2 of them 11/30/2019 and the Space pen fine point fits with NO modifications. The refills are about $5 a piece now.
https://smile.amazon.com/gp/product/B007AIP8G6/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1

Question 3

Is there a 0.5 mm version of this pencil?

Accepted Answer

Technically, no, but there is a way to modify the M-701 to become a 0.5 lead mech pencil.It's essentially taking the interior of a M-402 mech pencil (which houses 0.5mm lead) and swapping the interior with that of a M-701. (you can also swap the pocket clip from the m-402 to the m-701 as well as people prefer the one on the m-402.)Your end results will be a M-701 mechanical pencil with 0.5mm lead in a sleek body that has great balanced weight, as well as a M-402 with 0.7mm lead and can be used as a backup. The internals for both pencils are the same.

Question 4

How long is the pen?

Accepted Answer

The length is that of an average pen. But it would not fit into our checkbook holder because it was so fat....

ASIN	B002L6RB80
Additional Features	Retractable
Age Range Description	Adult
Best Sellers Rank	#3,775 in Office Products ( See Top 100 in Office Products ) #75 in Ballpoint Pens
Body Shape	Round
Brand Name	Zebra Pen
Closure Type	Retractable
Color	Black A
Customer Reviews	4.7 4.7 out of 5 stars (9,200)
Drill Point	Fine
Global Trade Identification Number	00045888294110
Grip Type	Comfort
Hand Orientation	Ambidextrous
Hardness	F
Included Components	Instruction Guide
Ink Base	Water
Ink Color	Black
Item Diameter	0.8 millimeters
Item Dimensions	1 x 3.3 x 8 inches
Item Type Name	Medium
Item Weight	1.12 ounces
Line Size	0.8mm millimeters
Manufacturer	Zebra Pen
Material Type	Stainless Steel
Model Name	ball point pen
Model Number	29411
Pattern	single item
Recommended Uses For Product	Writing
Style	Ballpoint Pen
UPC	045888294110
Unit Count	1 Count
Warranty Description	1-Year Limited
Water Resistance Level	Water Resistant
Writing Instrument Form	Ballpoint Pen
Writing Technique	ballpoint

Zebra Pen STEEL F-701 Retractable Ballpoint Pen, Black Ink, 0.8mm, 1-Pack

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