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Anyone who has swapped a muzzle brake or flash hider knows a crush washer is the little part that makes the whole job clean. GrovTec's .308 crush washers come five to a pack, so you always have a fresh one ready when you're timing a new muzzle device or reinstalling one after cleaning. They're cut for 5/8-24 threads, which is the standard pitch you'll find on most .308 and 6.5 barrels.
These washers are made from high quality steel and wear a premium black nitride finish, so they hold up to the heat and torque that comes with a muzzle device sitting right at the business end. The crush washer does exactly what the name says: it compresses as you torque down the device, taking up the slack and letting you clock a brake or hider to top dead center without shims or fuss. That compression is why crush washers are single-use, and why buying them five at a time makes life easier.
Installation is simple. Slide the washer onto the threads with the concave side facing the shoulder of the barrel, thread on your muzzle device, and torque until it's timed correctly. If you ever pull the device off, plan on using a new washer for the next install rather than reusing a crushed one, which is the whole point of keeping a five-pack in the range bag or on the bench.
Whether you're building an AR-10 pattern rifle, running a bolt gun, or just tinkering with different muzzle setups, having spare washers on hand means you're never stuck mid-project waiting on a part. It's a small, no-nonsense piece that quietly makes every muzzle swap go smoother.
They're made for 5/8-24 threads, which is the common thread pitch on .308 and 7.62 barrels, along with many 6.5 caliber rifles. That's the standard interface for most .308 muzzle brakes and flash hiders. Always double check your barrel's thread spec before ordering.
Crush washers are designed to compress once as you torque the device down, so they're really meant for single use. Reusing one that's already been crushed usually won't give you a reliable seat or proper timing. That's exactly why GrovTec sells them in a five-pack, so you have fresh ones ready for future swaps.
Slide the washer onto the threads with the concave side facing the shoulder of the barrel, then thread your muzzle device on. Torque it down until the device is clocked to the correct position, typically top dead center for a brake or hider. The washer compresses as you go, taking up slack and locking things in place.
Each washer wears a premium black nitride finish over steel construction. That finish helps them resist the heat and wear that come with sitting at the muzzle end of the barrel. The matte black look also blends right in under most muzzle devices.
| UPC | 811071013468 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | GTHM320 |
| Chokes Included | 5/8"-24 tpi |
| Color | Black |
| Length | Crush Washer |
| Model | |
| Shipping Weight | 0.065 |
| Sights | Steel |
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