BudsGunShop.com - Thread Tap size
-
-
What is the thread Tap(s), "2 of them" for the iron site mounting holes and the scope base mounting holes on a Traditions Vortek Strikerfire LDR muzzleloader?
6 Answers

All Guns Ship Free!
Email Us
login modal
shopping cart
Drill size for tap is #29 for 8-40 tap. That's 75% cut. Use tap magic and go slow. If it get snug, back out, clean tap continue. Small threads you only get one shot. Be tedious.
If you mean #2 threads, they are 56TPI UNC thread form and the recommended drilling size is 1.85mm. Sutton tools has #2 taps available in spiral flute.
I would contact traditions to verify.
These are 8-40 I believe.
1-1/2 threads lead-in I believe
As a whole our 4+ million customer's know more about firearms than we do. If you have a general question about a product we highly recommend that you first try out our customer Q&A feature. More often than not you will receive multiple answers to your question in minutes.
For the best customer experience using Live Chat, we recommend using Google Chrome.
Enter your email address to receive our best deals and other store updates.
Copyright © 2003-2026 BudsGunShop.com
All Rights Reserved. (NW2)

Sign up for Bud's Gun Shop text alerts and never
miss an exciting deal or important update.
By providing your number above, you agree to receive recurring autodialed marketing text msgs (e.g. cart reminders) to the mobile number used at opt-in from Bud's Gun Shop on 82124.
Reply with birthday MM/DD/YYYY to verify legal age of 21+ in order to receive texts.
Consent is not a condition of purchase. Msg frequency may vary. Msg & data rates may apply. Reply HELP for help and STOP to cancel.
See our terms & conditions
& privacy policy.
We appreciate you signing up
for special deals.
View our terms & conditions
& privacy policy.
99% of scope mount bases will either be #8-40tpi, or #6-48tpi, the other 1% would be "metric".