What thread is this?

[Ryan_Songhurst]

Want to order a DPT overbarrel for my 300saum as the MAE muzzle forward on it now makes it a pretty long beast, i just measured the thread and came up with .625" and 18 (maybe 20?) threads per inch. Can anyone tell me what the designated name of that thread might be?

[Kiwi Greg]

Want to order a DPT overbarrel for my 300saum as the MAE muzzle forward on it now makes it a pretty long beast, i just measured the thread and came up with .625" and 18 (maybe 20?) threads per inch. Can anyone tell me what the designated name of that thread might be?

5/8 x 18 ? which is 5/8 unf

[SiB]

Many nuts/bolts/fasteners trade suppliers will have a sample board of threads. Take the suppressor in and find the bolt what fits. (Some might get twitchy if you walk in w firearm lol). I've done this several times with odd tractor parts that seem to have quite independant ideas of what thread goes where.