GrovTec US Inc GTHM319 Black Nitride Steel Crush Washers .223 Cal, 1/2"-28 TPI, 5-Pack

GrovTec crush washers in .223 caliber (1/2"-28 TPI) are a no-frills solution for anyone running a muzzle device on an AR-pattern rifle or other .223-chambered platform. These five-pack steel washers let you lock down brakes, flash hiders, and suppressors with a solid, repeatable crush fit — no timing games, no guesswork. They're finished in black nitride for corrosion resistance in the field and on the range.

Crush washers work by deforming slightly under torque to take up space between your muzzle device and barrel shoulder, ensuring everything sits flush and stays put. They're a straightforward, proven method trusted by precision shooters and tactical operators alike. If you're setting up a .223 muzzle device for the first time or rebuilding a rifle, having spares on hand means you're never stuck waiting for parts.

The black nitride steel construction holds up to repeated installation and removal cycles, and the finish resists rust in storage and harsh conditions. At five washers per pack, you've got enough for your primary rifle and spares for replacements or future builds — a smart, inexpensive insurance policy.

Key Features

• Designed for .223 caliber muzzle devices
• 1/2"-28 TPI thread pitch
• Black nitride steel finish for corrosion resistance
• Five-pack quantity
• Allows secure, repeatable crush-fit installation

Specifications

Caliber	.223
Thread Pitch	1/2"-28 TPI
Material	Steel
Finish	Black Nitride
Quantity	5 per pack

Frequently Asked Questions

What .223 muzzle devices are these crush washers compatible with?

These washers are sized for any .223 muzzle device with 1/2"-28 TPI threading. That covers the vast majority of AR-15 and .223-chambered rifle brakes, flash hiders, and suppressors, but verify your device's thread pitch before ordering.

How many crush washers do I actually need?

One washer per muzzle device installation. This five-pack gives you one for your rifle plus spares for future builds, replacements if a washer gets damaged during removal, or lending to a friend.

Do I need to replace a crush washer every time I remove my muzzle device?

Crush washers deform under torque. Whether you replace it each time depends on how badly it's crushed and how tight you torque. Many shooters reuse them several times before swapping in a fresh one from the pack.

Will these washers rust or corrode?

The black nitride finish provides corrosion resistance, making them suitable for storage and use in wet or harsh conditions. Nitride finishes are tougher and more corrosion-resistant than plain steel.