Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
AR Sponsor
1/19/2014 3:44:08 PM EDT
I had to remove the flash hider on my barrel today to install a rail and have a question about reinstallation. It had a crush washer on it and it looked fine so I reused it but I ended up torqueing it well past 50lbs and the flashinder is still a bit off(it's an A2). It's close enough that I'm fine where it's at, but is that too much torque(I know the TM says 15-20)? Should I take it back off and use a fresh crush washer or just leave it alone?
1/19/2014 4:48:24 PM EDT
[#1]
I've always just used a fresh crush washer.
1/19/2014 5:20:30 PM EDT
[#2]
Its a lot cheaper to use a new washer than it is to strip out the threads.
1/19/2014 5:48:27 PM EDT
[#3]
I just installed one using a peel washer,  and after I got it hand tight I needed to use a wrench to get it to Time perfectly which was about 15° from hand tight. Do you think this was too much torque?
1/19/2014 10:00:55 PM EDT
[#4]
Quote History
Quoted:
I just installed one using a peel washer,  and after I got it hand tight I needed to use a wrench to get it to Time perfectly which was about 15° from hand tight. Do you think this was too much torque?
View Quote


This is the proper way to do it.

For the OP, crush washers aren't made to be reusable. Get a new one [or a peel washer]. Tighten hand-tight [after applying Rockset if desired]. (peel layers if necessary until 5-15 degrees from timed) Then use a wrench to tighten until it's vertical.
1/20/2014 5:50:32 AM EDT
[#5]
I went ahead and used a new washer then got it lined up with 20lbs of torque.
1/20/2014 6:16:25 AM EDT
[#6]
Quote History
Quoted:


This is the proper way to do it.

For the OP, crush washers aren't made to be reusable. Get a new one [or a peel washer]. Tighten hand-tight [after applying Rockset if desired]. (peel layers if necessary until 5-15 degrees from timed) Then use a wrench to tighten until it's vertical.
View Quote View All Quotes
View All Quotes
Quote History
Quoted:
Quoted:
I just installed one using a peel washer,  and after I got it hand tight I needed to use a wrench to get it to Time perfectly which was about 15° from hand tight. Do you think this was too much torque?


This is the proper way to do it.

For the OP, crush washers aren't made to be reusable. Get a new one [or a peel washer]. Tighten hand-tight [after applying Rockset if desired]. (peel layers if necessary until 5-15 degrees from timed) Then use a wrench to tighten until it's vertical.


thanks for confirmation on this, I thought I put it on with too much force but glad Im in tolerance.  I don't ever plan on taking off but good to know.
1/20/2014 9:19:29 AM EDT
[#7]
Peel Washer = T limit , if you hit the T limit, and still not lined up, remove some of the peel washer, a razor blade and a Bic lighter help.
Crush Washer has no T limit as it crushes at a set T. A crushwasher is only good for 1.5 turns from contact (first time use) go beyond that replace the washer.
AR Sponsor