Sealing off gas to threads, O-ring or contact shoulder?

[este]

Taking a look at Silencerco's three lug, that shoulder they have for the threads, is that for a contact engagment of a mating shoulder inside the can, or is that for an O-ring?

https://cdn.shopify.com/s/files/1/0157/ ... 1391014552

Fat chance, but does anyone have the thread spec for Silencerco's thread length and shoulder?

[RJT]

Mine didn't come with an o-ring, it just stops on the booster housing when screwed on tight, same with the fixed barrel spacer. I don't know if that answers your question, or not.

[Bendersquint]

Taking a look at Silencerco's three lug, that shoulder they have for the threads, is that for a contact engagment of a mating shoulder inside the can, or is that for an O-ring?

https://cdn.shopify.com/s/files/1/0157/ ... 1391014552

Fat chance, but does anyone have the thread spec for Silencerco's thread length and shoulder?

No oring.

Can't release the thread specs..ask Silencerco they may give them to you.

[doubloon]

...
Fat chance, but does anyone have the thread spec for Silencerco's thread length and shoulder?

Google says

https://s3.amazonaws.com/com.silencerco ... _specs.PDF

https://s3.amazonaws.com/com.silencerco ... _Guide.pdf

https://s3.amazonaws.com/com.silencerco ... 1-2x28.pdf

[RJT]

I'm thinking he wants the specs for the 3 lug adapter

[tommyid1]

why can't you release the thread specs? Op get a thread gauge and measure it out for yourself.

[doubloon]

I'm thinking he wants the specs for the 3 lug adapter

Hmmm ... may have to google harder.

[este]

I'm thinking he wants the specs for the 3 lug adapter

Hmmm ... may have to google harder.

Yea, thanks smartass, but be my guest. I looked, found nothing except the difference between Gemtech's and Silencerco's major and minor pitch.

No Oring. So Bender, can you are least say that the shoulder before the threads is indexing/sealing contact with a mating shoulder?

[doubloon]

I'm thinking he wants the specs for the 3 lug adapter

Hmmm ... may have to google harder.

Yea, thanks smartass, ...

I wasn't being a smartass I was saying "I" may have to google harder.

But since you're being such a dense d*khead about it I'll keep the answer I found.

[silencer_kid]

the pic may be deceiving. looks like a negative shoulder just behind the threads. from pics alone, looks like 3/4 6/.25

detail Z with very small radius for N, or its kept at or below minor thread dia, just depends on if the mating thread wall/hole on the ID is chamfered or left sharp.

[este]

But since you're being such a dense d*khead about it I'll keep the answer I found.

Oh, sensitive sally, I'm sorry. I'll just order a 3-lug from my dealer and measure it out and look at a can in person.

[Capt. Link.]

the pic may be deceiving. looks like a negative shoulder just behind the threads. from pics alone, looks like 3/4 6/.25

detail Z with very small radius for N, or its kept at or below minor thread dia, just depends on if the mating thread wall/hole on the ID is chamfered or left sharp.

It's called a relief cut.A normal feature when threading to a shoulder.
-CL

[silencer_kid]

It's called a relief cut.A normal feature when threading to a shoulder.
-CL

yes, and also "undercut".

[Capt. Link.]

It's called a relief cut.A normal feature when threading to a shoulder.
-CL

yes, and also "undercut".

A threading relief cut is more specific to location and use while a undercut is more a general term.

[silencer_kid]

agreed. "relief" is like you say, more specific. but i see no reason to try and correct "undercut" because a relief is just a special type of undercut, just as a square is a special type of rectangle.
https://en.wikipedia.org/wiki/Undercut_ ... cturing%29

and btw, not sure where the admin on this site is, but the default style here using white text on light gray is horrible.