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Intermediate thread tap for Bock FP nib sections

Thread taps and dies » » Intermediate thread tap for Bock FP nib sections


(£24.58 excl. Vat)

Item code: tt/8.5x1.0/2

In stock



Intermediate thread tap (US - Plug tap) for Bock ready-made size 5, 6 and 8 fountain pen sections.

Made by TapCo from M2 HSS steel, the thread size is 8.5 x 1.0 and we recommend a drill size of 7.5mm

We have drawings available for Bock #5, #6 and #8 sections - please enquire.

Product details
Product details
  • Intermediate tread tap for Bock size 5, 6 and 8 ready-made sections
  • M2 HSS
  • Thread size = 8.5 x 1.0
  • Recommended drill size = 7.5mm
  • Drawings available for Bock #5, #6 and #8 sections - please enquire

Drill the front end of your pen body to 7.5mm, and cut the 8.5mm thread according to your usual working method.

Please note though, that a hole is too small to take all but plastic ink converters. If you wish to use a better quality converter, you will need to enlarge the hole after cutting the thread.

Cut the thread first then ream or drill it out to 8mm, which will then give you enough clearance. There is no load or stress on the thread once the section is screwed in, so enlarging the hole to this extent will not have any effect on its integrity.

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Beaufort Ink
Great Wotton Cottage Studios
EX17 5DL
Beaufort Ink is a trading name of Beaufort Ink Ltd
Company Registration No. 13302793
VAT Registration No. GB266698248

© Beaufort Ink
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