Rst1990 Posted September 18, 2015 Report Share Posted September 18, 2015 I have just purchased a new rifle and have found out that my thread pattern is 1/2 28tpi not the norm 1/2 20tpi. I have two moderators and both are 1/2 20tpi, one is a sak and the other a-tec, I know I can sell one and send my ticket off for a variation, but to try and save myself time can I just purchase the bottom part of either moderator with the 1/2 28tpi thread and swap over? So I'm not buying a full mod just the thread part that I need? Thanks Quote Link to comment Share on other sites More sharing options...
saddler Posted September 18, 2015 Report Share Posted September 18, 2015 There are adaptors too... Tapped with an inner 1/2 20 thread & an outer 1/2 28 thread Cheaper than a new moderator & lots of paperwork/delays Quote Link to comment Share on other sites More sharing options...
Rst1990 Posted September 19, 2015 Author Report Share Posted September 19, 2015 Where can I buy these adaptors? I had a quick look on the net and couldn't come up with anything. I spoke to my local rfd and he said that there is nothing like it on the market? Thanks Quote Link to comment Share on other sites More sharing options...
saddler Posted September 19, 2015 Report Share Posted September 19, 2015 (edited) Where can I buy these adaptors? I had a quick look on the net and couldn't come up with anything. I spoke to my local rfd and he said that there is nothing like it on the market? Thanks Glad your RFD is the font of all knowledge - I suggest changing to one that does more than sell shotgun ammo & Chinese airguns (just a stab in the dark on his main trade given his in depth grasp of the available options) I've used quite a few such items - they are more common in the USA - so a certain auction site there is the place to go; but we are not allowed to post links to it or to item numbers/trader names (ETA: JUST had a look - one in Cyprus for $25 including P&P - and that is BEFORE I start to dig through about 3000 listing results to find cheaper ones...) BUT That is the port of last call for them due to P&P - ask around to see if anyone you know has a lathe, as they ARE both commonly used threads: common UK one is 1/2"x20 (called 1/2" UNF) & the USA one is the 1/2"x28 (called 1/2" UNEF) = The "F" meaning Fine & the EF meaning Extra Fine If you get stuck let me know Edited September 19, 2015 by saddler Quote Link to comment Share on other sites More sharing options...
Rst1990 Posted September 19, 2015 Author Report Share Posted September 19, 2015 Thanks for the info, I have one on order thank you Quote Link to comment Share on other sites More sharing options...
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