Are the GrovTec GTHM319 crush washers reusable if I need to remove my muzzle device for barrel cleaning?

No, these are designed strictly as single-use items. Once compressed under wrench torque during initial installation, the crush washer deforms and loses its elasticity, meaning it cannot be reliably reused for a subsequent reinstall without risking improper alignment.

Will the GTHM319 crush washers fit my 6.5 Creedmoor or .308 rifle barrel?

No, the GTHM319 model is specifically engineered with a 1/2"-28 TPI thread interface for .223 Remington and 5.56 NATO barrels. For larger calibres with 5/8"-24 threads, you would need the GrovTec GTHM320 model instead.

Can I use these crush washers when installing a sound suppressor on my .223 rifle?

It is not recommended. For mounting sound moderators or suppressor-mount muzzle brakes where absolute bore concentricity is critical to avoid baffle strikes, precision shim kits should be used rather than crush washers.

How do these washers hold up against heat and moisture during outback hunting trips?

Constructed from high-quality steel with a premium black nitride finish, the GTHM319 washers offer enhanced surface hardness and robust resistance against carbon fouling, high barrel temperatures, and harsh outdoor moisture encountered in Australian field conditions.

.223 Crush Washer - Grovetec GTHM319

The Grovtec Crush Washer .223 - 5 Pack (MPN: GTHM319) is a mechanical firearm hardware component engineered to provide tension and allow proper rotational indexing when installing muzzle devices on rifle barrels. Constructed from high-quality steel with a protective black nitride finish, each washer deforms evenly under wrench torque to align muzzle brakes, compensators, and flash hiders precisely without damaging barrel threads or over-torquing. The corrosion-resistant nitride treatment protects against heat, carbon fouling, and environmental moisture during regular maintenance and field use.

Key Features

Controlled Compression: Crushes evenly during installation to achieve exact rotational timing of ported muzzle devices on compatible barrels.
Corrosion-Resistant Surface: Black nitride finish increases surface hardness and guards against moisture, heat, and carbon build-up.
Multi-Unit Pack: Supplies 5 crush washers per pack for multiple installations, rebuilds, or regular workshop servicing.
Thread-Specific Interface: Engineered specifically for standard 1/2"-28 TPI barrel muzzles chambered in .223 Remington and 5.56 NATO.

Specifications

Manufacturer: GrovTec US, Inc.
Model Number (MPN): GTHM319
Material & Finish: Steel with black nitride finish
Thread Compatibility: 1/2"-28 TPI
Calibre Compatibility: .223 Remington / 5.56 NATO
Quantity: 5 crush washers per pack
Total Retail Package Weight: 0.06 lbs (~27 g)
Internal Diameter: Standard 1/2" clearance

Who is the Grovtec Crush Washer .223 - 5 Pack for?

Australian Target Shooters — Requiring precise rotational timing when fitting compensators or muzzle brakes onto .223 Remington centrefire rifles featuring a 1/2"-28 TPI threaded muzzle interface.
Hunters — Needing a dependable steel crush washer with a corrosion-resistant black nitride finish to complete custom barrel maintenance while adding only a negligible portion of the 0.06 lbs total retail package weight to their field kit.
Gunsmiths and Armourers — Utilizing a bulk supply of 5 crush washers per pack to service multiple customer rifle builds, barrel replacements, and muzzle device installations standard to 1/2"-28 TPI threads.

Less suitable for: Firearm platforms utilizing larger 5/8"-24 threads (such as .308 Winchester or 6.5 Creedmoor), metric barrel profiles (such as M14x1, M15x1, or M18x1), previously compressed installations (as these are single-use components), or suppressor mounts requiring precise bore concentricity; these configurations require calibre-matched 5/8"-24 crush washers, metric-threaded hardware, or dedicated precision alignment shim kits.

SKU	GT40834LP
Model #	GTHM319
Brand	Grovetec
Shipping Weight	1.0000kg

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Grovetec Gthm319 Crush Washer .223 5 Pack 1/2-28 Tpi Nitride

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