snipers eye Posted March 15, 2023 Report Share Posted March 15, 2023 hi everyone,just got a new savage axis 223,i will want to put a moderator on,but dont know what thread size to ask for,i took these pictures,if it helps.thanks Quote Link to comment Share on other sites More sharing options...
London Best Posted March 15, 2023 Report Share Posted March 15, 2023 Get someone who actually knows how to measure threads to measure it for you. You need a mechanical engineer, preferably a toolmaker, or a model engineer who knows what he is talking about. You need to measure the outside diameter accurately (micrometer) and accurately measure the threads per inch, or the pitch of the threads if metric. It could be either metric or imperial measurements. This needs doing properly! Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted March 15, 2023 Report Share Posted March 15, 2023 Hello, this came up, 1/2 X 28 Tpi 🤔 Quote Link to comment Share on other sites More sharing options...
ditchman Posted March 15, 2023 Report Share Posted March 15, 2023 take it into your local gunsmith...he may have a few mods to try out with the right thread.....he should also have a pitch gauge Quote Link to comment Share on other sites More sharing options...
Rat Boy Posted March 15, 2023 Report Share Posted March 15, 2023 Looks like 11/16th by 24 Tpi to me Quote Link to comment Share on other sites More sharing options...
snipers eye Posted March 15, 2023 Author Report Share Posted March 15, 2023 1 hour ago, oldypigeonpopper said: Hello, this came up, 1/2 X 28 Tpi 🤔 folks thanks for reply's,but as you can see it measures 5/8 x 5/8 inch, iv seen the term 5/8 UNF on some websites selling the wildcat evolution (thats the mod im after) so would that be the term /thread size i quote when ordering the mod? Quote Link to comment Share on other sites More sharing options...
oldypigeonpopper Posted March 15, 2023 Report Share Posted March 15, 2023 13 minutes ago, snipers eye said: 2 hours ago, oldypigeonpopper said: Hello, this came up, 1/2 X 28 Tpi 🤔 folks thanks for reply's,but as you can see it measures 5/8 x 5/8 inch, iv seen the term 5/8 UNF on some websites selling the wildcat evolution (thats the mod im after) so would that be the term /thread size i quote when ordering the mod? Hello, is that from your local RFD ? If online it will need go RFD to RFD , if your set on the wildcat mod ok but I would also look at getting and adapter made to half inch UNF Quote Link to comment Share on other sites More sharing options...
Stonepark Posted March 15, 2023 Report Share Posted March 15, 2023 Savage threading is normally 5/8 by 24 Quote Link to comment Share on other sites More sharing options...
snipers eye Posted March 15, 2023 Author Report Share Posted March 15, 2023 34 minutes ago, oldypigeonpopper said: Hello, is that from your local RFD ? If online it will need go RFD to RFD , if your set on the wildcat mod ok but I would also look at getting and adapter made to half inch UNF hi,thats just me with a tape measure,yes im set on the wildcat,would rather jut get the size right,than an adapter 33 minutes ago, Stonepark said: Savage threading is normally 5/8 by 24 thanks,so when ordering ill just quote that thread size then,i know its not half inch by the measuring tape,it is 5/8,im just wondering is length a factor? Quote Link to comment Share on other sites More sharing options...
Stonepark Posted March 15, 2023 Report Share Posted March 15, 2023 1 hour ago, snipers eye said: hi,thats just me with a tape measure,yes im set on the wildcat,would rather jut get the size right,than an adapter thanks,so when ordering ill just quote that thread size then,i know its not half inch by the measuring tape,it is 5/8,im just wondering is length a factor? Most common US sizes are 1/2x28, 9/16 x24, 5/8x24. There is 3mm difference between each size in diameter which is easily identifiable in your photo no 1, being 5/8. In photo 2 you are showing 12 threads for a length of 1/2 of an inch thread length, hence 24tpi. Length is not a factor as the mods are threaded longer to screw up tight against the barrel step. Quote Link to comment Share on other sites More sharing options...
snipers eye Posted March 15, 2023 Author Report Share Posted March 15, 2023 thanks folks,great help as always Quote Link to comment Share on other sites More sharing options...
Jaymo Posted March 16, 2023 Report Share Posted March 16, 2023 It’s 5/8th. I have a wildcat bridge here in that size if you need one. It’s 5/8th unef (24tpi) I have a wildcat bridge here in 5/8 unf which is 18tpi and can’t for the life of me, remember why I have it. Quote Link to comment Share on other sites More sharing options...
snipers eye Posted March 16, 2023 Author Report Share Posted March 16, 2023 2 hours ago, Jaymo said: It’s 5/8th. I have a wildcat bridge here in that size if you need one. It’s 5/8th unef (24tpi) I have a wildcat bridge here in 5/8 unf which is 18tpi and can’t for the life of me, remember why I have it. thanks very much jaymo,ill be ordering the mod next week,ill be stating thread size 5/8 unef 24tpi,if i have any problems,ill get back to you on that bridge,thanks Quote Link to comment Share on other sites More sharing options...
snipers eye Posted March 30, 2023 Author Report Share Posted March 30, 2023 update on size......it was indeed 18x1,got the wildcat today...ratboy above was spot on...Looks like 11/16th by 24 Tpi to me,...thanks to all for replies,happy days ahead Quote Link to comment Share on other sites More sharing options...
London Best Posted March 30, 2023 Report Share Posted March 30, 2023 Like I said in the first reply: you needed somebody who actually knew what he was looking at. You cannot measure threads with a tape measure and get an accurate answer. Quote Link to comment Share on other sites More sharing options...
snipers eye Posted March 30, 2023 Author Report Share Posted March 30, 2023 3 hours ago, London Best said: Like I said in the first reply: you needed somebody who actually knew what he was looking at. You cannot measure threads with a tape measure and get an accurate answer. well i did it with a tape measure,it was 11/16 x24 tpi, which equates to 18x1 metric......now although i was not 100% sure,i checked over and over again,i knew it was not 14x1,,so i did take the chance and ordered the 18x1,if i had been wrong,i would have then took it to a gun smith and have it done properly,and then bought the size bridge,but it fits,so im happy Quote Link to comment Share on other sites More sharing options...
London Best Posted March 30, 2023 Report Share Posted March 30, 2023 (edited) 1 hour ago, snipers eye said: well i did it with a tape measure,it was 11/16 x24 tpi, which equates to 18x1 metric......now although i was not 100% sure,i checked over and over again,i knew it was not 14x1,,so i did take the chance and ordered the 18x1,if i had been wrong,i would have then took it to a gun smith and have it done properly,and then bought the size bridge,but it fits,so im happy 11/16 x24 tip is NOT 18x1 metric. 11/16 inch = 17.4625 mm, not 18. 24 tip is two thousandth of an inch more than 1 mm pitch. Unified threads have a slightly different thread form to metric, on the crests and roots. An 18x1 nut would screw onto an 11/16 x24 spigot for a very short length, but not the other way round. It is certainly not good enough fit for a rifle moderator, which needs to be perfect. I spent my entire working life making precision threads. I rest my case. Edited March 30, 2023 by London Best Quote Link to comment Share on other sites More sharing options...
snipers eye Posted March 30, 2023 Author Report Share Posted March 30, 2023 4 hours ago, London Best said: 11/16 x24 tip is NOT 18x1 metric. 11/16 inch = 17.4625 mm, not 18. 24 tip is two thousandth of an inch more than 1 mm pitch. Unified threads have a slightly different thread form to metric, on the crests and roots. An 18x1 nut would screw onto an 11/16 x24 spigot for a very short length, but not the other way round. It is certainly not good enough fit for a rifle moderator, which needs to be perfect. I spent my entire working life making precision threads. I rest my case. well it fitted,thats all that matters to me. Quote Link to comment Share on other sites More sharing options...
snipers eye Posted March 30, 2023 Author Report Share Posted March 30, 2023 ps,here is a 5 shot group i did today at 100 yrds,with the mod fitted,thats a 10 cent coin,im happy enough Quote Link to comment Share on other sites More sharing options...
Rim Fire Posted March 31, 2023 Report Share Posted March 31, 2023 Nice group home loads or factory if factory what make Quote Link to comment Share on other sites More sharing options...
London Best Posted March 31, 2023 Report Share Posted March 31, 2023 Very good group, well done. Quote Link to comment Share on other sites More sharing options...
snipers eye Posted March 31, 2023 Author Report Share Posted March 31, 2023 thanks lads,the group was done with hornady 55 grain v max,no barrel break in,i just zeroed and shot that group,hope it stays that way, Quote Link to comment Share on other sites More sharing options...
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