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Old 04-04-2008, 12:35 PM   #1
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Default Crush Washer vs. Peel Washer

need some help please:

i bought a flash hider to mount on my charlie. *i found a thread explaining how to heat up a peel washer to help delaminate the layers to be able to peel them off. *that seems to work well and that is how i have my flash hider on now. *but i would prefer to use the crush washer since it is a matching black color intead of a brght metallic that stands out like a sore thumb against the black barrel and hider.

so how do i get the darn thing to "crush" *i can't get a grip on the barrel tight enough to crush the washer and align the flash hider. *i don't want to put the frame of the gun in the vice and try to turn it for fear of cracking the plastic frame.

any ideas? *has anyone ever heated a crush washer to make it softer? *is the gas block on the barrel attatched well enough to be used as a clamp point?

thanks in advance for any help.

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Old 04-04-2008, 02:57 PM   #2
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Default Re: Crush Washer vs. Peel Washer

Blue loctite. If your MB or FS needs to be "timed" (lined up a certain way) then you have to sand down the crush washer. With my Phanton MB, I installed the washer then the Brake finger tight, If it needed to turn further then 1/8-1/4 of a turn to be right on or "up", I sanded the washer on some 600 grit. Just hold the washer down on the paper over a flat surface and make little circles. Not to much though, It sands fast. Once you get to the 1/8-1/4 then the blue loctite actually acts as a lube while you crank it on. My Phantom had a place for a 7/8 wrench and I held the barrel with a rubberized garden glove. What FS are you going to use ?

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Old 04-04-2008, 07:21 PM   #3
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Default Re: Crush Washer vs. Peel Washer

i thought the whole point of a crush washer was that it deforms under pressure to become the correct thickness? wouldn't sanding it down defeat the purpose?

for now, i just got the standard cheapie $6 cage from midway to see how i like it...

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Old 04-05-2008, 01:54 AM   #4
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Default Re: Crush Washer vs. Peel Washer

help anyone? aren't these things supposed to "crush" as the name implies?

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Old 04-05-2008, 03:43 AM   #5
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Default Re: Crush Washer vs. Peel Washer

Yes they do crush, but only to a certain amount. JB-Norcal explained this earlier. You might want to wrap a old towel around the gas block and place it loosely in a vise and tighten the flash suppressor to 20 ft/lbs (which isn't really very tight) after applying the blue locktite. You should sand the flat side of the crush washer to acheive the proper thickness as explained earlier. The tapered side is the "crush" side.


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Old 04-05-2008, 06:35 AM   #6
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Default Re: Crush Washer vs. Peel Washer

They do crush, but only a little at a time. You have to tighten and loosen, then tighten them again. Each time, it will crush further. Have made nearly a full turn by using this method.

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Old 04-07-2008, 03:23 AM   #7
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Default Re: Crush Washer vs. Peel Washer

EMD
I used a crush washer to mount my linear compensator(it looked better and hid the threads). With this compensator it dosen't matter how it is aligned, some muzzle brakes have definite alignment requirements. *Loctite is great- I didn't need it. *I put my SU-16's BARREL in a vice with PADDED jaws (pieces of fir-(not fur!))- I wrapped the compensator with about 6-8 wraps of electrical tape then took a pipe wrench to it - about 1/2 turn past hand tight did it - 500 rounds so far and it is still tight- if ever loosens I will Loctite it!!- some brakes have "flats" for a cresent wrench-these are a snap to install (pad the flats with tape to prevent scratches)

Never use the plastic receiver or the gas block (it is pressed on -not pinned or soldered!!) to clamp into a vise, they might break loose :'(

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Old 04-12-2008, 07:16 PM   #8
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Default Re: Crush Washer vs. Peel Washer

I picked up a YHM Phatom 5M1 that comes with a crush washer. Can't seem to get it passed 10 o'clock or so, from the top center mark (the central "spike&quot.

I've been trying Hilljack's tighten/loose method for the last couple days... how tight should I be making it and how often should I be un/re-tightening?

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Old 04-12-2008, 07:53 PM   #9
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Default Re: Crush Washer vs. Peel Washer

You should tighten it enough to crush the washer some, then loosen and retighten as many times as necessary to clock it properly. If this fails, you might need to sand the washer down some to allow you to position it correctly, the washer are soft so go slowly.


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Old 04-13-2008, 04:49 AM   #10
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Default Re: Crush Washer vs. Peel Washer

Bam Bam has it. As was stated, you must hold the barrel tight, in a padded vice. Also, about 20 foot pounds of torque, is all you need, on the MB/FH.

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