The Lantac crush washer (brand part no. 01PP5824CRW) is sized for 5/8-24 threaded muzzle devices, the small single-use washer that takes up thread play and locks a muzzle device’s timing in the correct clocked position. As the muzzle device is torqued down, the washer physically crushes and compresses, which is what gives it a permanent, non-reusable seat once installed correctly. It’s confirmed as a genuine AR-15 accessory and ships on a compact card, roughly 3.45 by 2.5 by 0.45 inches, small enough to toss in a range bag or parts bin. Builders installing any 5/8-24 threaded muzzle device need one of these to get the device indexed straight.

Key Specifications

• Sized for 5/8-24 threaded muzzle devices.
• Compresses permanently to take up thread play and lock timing in place.
• Single-use design; once crushed, it should not be reused.
• Confirmed as a genuine AR-15 accessory.
• Ships on a compact card measuring roughly 3.45 by 2.5 by 0.45 inches.

Frequently Asked Questions

Can I reuse a crush washer? No, once it’s crushed to lock the muzzle device’s timing, it shouldn’t be reused.

What thread pitch is this sized for? 5/8-24, standard for many .223/5.56 muzzle devices.

Why do I need a crush washer at all? It takes up thread play so the muzzle device can be torqued down while landing in the correct clocked position.

Buy the Lantac Crush Washer

Get your muzzle device indexed straight the first time. Order the Lantac USA crush washer from our muzzle devices lineup, and our Lubbock, Texas team can help confirm thread compatibility before it ships.