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GrovTec US Standard Thread Protector Up to 35% Off — 8 models

GrovTec US Muzzle Thread Protector, Fit to Barrel, Some .22's, 1/2x20 Thread, .625in OD, Black, GTHM242
GrovTec US Muzzle Thread Protector, For 10/22 Bull Barrel, 1/2x28 Thread, .920in OD, Black, GTHM243
GrovTec US Muzzle Thread Protector, For AR-10, .300 AAC Blackout, 5/8x24 Thread, .750in OD, Black, GTHM247
GrovTec US Metric Thread Protector, 15x1, Black, GTHM250
GrovTec US Metric Thread Protector, 14x1, Black, GTHM248
GrovTec US Muzzle Thread Protector, For Most AR Barrels, 1/2x28 Thread, .700in OD, Black, GTHM245
GrovTec US Muzzle Thread Protector, For Pencil Barrels, 1/2x28 Thread, .625in OD, Black, GTHM246
GrovTec US Muzzle Thread Protector, For Glock 17 & 19, Most 9mm, 1/2x28 Thread, .641in OD, Black, GTHM244
GrovTec US Muzzle Thread Protector, Fit to Barrel, Some .22's, 1/2x20 Thread, .625in OD, Black, GTHM242
GrovTec US Muzzle Thread Protector, Fit to Barrel, Some .22's, 1/2x20 Thread, .625in OD, Black, GTHM242
GrovTec US Muzzle Thread Protector, Fit to Barrel, Some .22's, 1/2x20 Thread, .625in OD, Black, GTHM242
1 of 10 images
GrovTec US Muzzle Thread Protector, Fit to Barrel, Some .22's, 1/2x20 Thread, .625in OD, Black, GTHM242
GrovTec US Muzzle Thread Protector, For 10/22 Bull Barrel, 1/2x28 Thread, .920in OD, Black, GTHM243
2 of 10 images
GrovTec US Muzzle Thread Protector, For 10/22 Bull Barrel, 1/2x28 Thread, .920in OD, Black, GTHM243
GrovTec US Muzzle Thread Protector, For AR-10, .300 AAC Blackout, 5/8x24 Thread, .750in OD, Black, GTHM247
3 of 10 images
GrovTec US Muzzle Thread Protector, For AR-10, .300 AAC Blackout, 5/8x24 Thread, .750in OD, Black, GTHM247
GrovTec US Metric Thread Protector, 15x1, Black, GTHM250
4 of 10 images
GrovTec US Metric Thread Protector, 15x1, Black, GTHM250
GrovTec US Metric Thread Protector, 14x1, Black, GTHM248
5 of 10 images
GrovTec US Metric Thread Protector, 14x1, Black, GTHM248
GrovTec US Muzzle Thread Protector, For Most AR Barrels, 1/2x28 Thread, .700in OD, Black, GTHM245
6 of 10 images
GrovTec US Muzzle Thread Protector, For Most AR Barrels, 1/2x28 Thread, .700in OD, Black, GTHM245
GrovTec US Muzzle Thread Protector, For Pencil Barrels, 1/2x28 Thread, .625in OD, Black, GTHM246
7 of 10 images
GrovTec US Muzzle Thread Protector, For Pencil Barrels, 1/2x28 Thread, .625in OD, Black, GTHM246
GrovTec US Muzzle Thread Protector, For Glock 17 & 19, Most 9mm, 1/2x28 Thread, .641in OD, Black, GTHM244
8 of 10 images
GrovTec US Muzzle Thread Protector, For Glock 17 & 19, Most 9mm, 1/2x28 Thread, .641in OD, Black, GTHM244
GrovTec US Muzzle Thread Protector, Fit to Barrel, Some .22's, 1/2x20 Thread, .625in OD, Black, GTHM242
9 of 10 images
GrovTec US Muzzle Thread Protector, Fit to Barrel, Some .22's, 1/2x20 Thread, .625in OD, Black, GTHM242
GrovTec US Muzzle Thread Protector, Fit to Barrel, Some .22's, 1/2x20 Thread, .625in OD, Black, GTHM242
10 of 10 images
GrovTec US Muzzle Thread Protector, Fit to Barrel, Some .22's, 1/2x20 Thread, .625in OD, Black, GTHM242

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Questions & Answers
What is the outside diameter of this protector Expert Answer

Diameter varies based on caliber, rifle, and barrel profile. Please contact us at techsales@opticsplanet.com with the exact model you are interested in, and we will be happy to assist you further.

by Ethan C., Gear Expert, July 30, 2018
See 1 More Answer
Does it include a rubber o-ring? Expert Answer

A rubber O-Ring is not included with the GrovTec US Standard Thread Protector.

by Hunter, Gear Expert, June 12, 2023
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Nice thread protector by AM, Verified Owner, July 31, 2019
Nice finish and very slim. The price is also nice. Knurling is deep and makes it easy to take off. Very nice for a pistol application. Might be too thin for a rifle. Overall a good value for the money.
1/1 found this helpful
Helpful Positive Review
GrovTec US Muzzle Thread Protectors by steve, February 14, 2019
Perfect accessory for the SGM Tactical Glock 17 Compatible Match Threaded Barrel. I would have given it 5 stars if it had come with a 2-011 o ring to hold it in place. Still, it's a must for any treaded barrel.
1/1 found this helpful
Helpful Positive Review
Works as advertised! by Lars, March 5, 2018
I love it when a product is exactly as described and priced appropriately for a disposable compnent that gets shot off sometimes. Theres not much you can do about that except find a cheap awsome ( meaning it works) tool for your application. The pack...
Read More...
3/4 found this helpful
Most Recent Reviews
1/2-28 Thread Protector by Rick, Verified Owner, January 9, 2026
Perfect fit on a HB 7.62x39 AR, stays snug, looks seamless, exact depth.
Most Recent Reviews
Grove tech thread protector by Bill, Verified Owner, January 3, 2025
Perfect fit on bca barrels,have 3 now.also best price.
Most Recent Reviews
Does NOT fit by D, Verified Owner, April 29, 2024
Ordered two of these and both do not fit, when you try to screw these on, it will get stuck and won't go any further than 2 twist in. Will be sending these back (was hoping these would fit, a bit disappointed).
Read All 8 Reviews
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8 Models Available
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Product Info for GrovTec US Standard Thread Protector

Protects threads when not using muzzle brakes, flash hiders or suppressors. Features quality steel construction and premium black-oxide finish.image

WARNING: California`s Proposition 65

Specifications for GrovTec US Standard Thread Protector:

Manufacturer: GrovTec US
Color: Black
Gun Model: Universal
Fabric/Material: Steel
Quantity: 1
Finish: Oxide

Features of GrovTec US Standard Thread Protector

  • One piece steel construction

Package Contents:

  • GrovTec US Standard Thread Protector

What firearm models does the manufacturer say GrovTec US Standard Thread Protector is compatible with?

The manufacturer suggests that GrovTec US Standard Thread Protector is compatible with Universal

GrovTec US Standard Thread Protector Orderable Models

List of Orderable Models

  • GrovTec US Standard Thread Protector, 1/2x20, .625in, Black, GTHM242 , MPN: GTHM242 , UPC: 811071012423 , Code: 8Z-TDP-GTHM1-GTHM242
  • GrovTec US Standard Thread Protector, 5/8x24, .750in, Black, GTHM247 , MPN: GTHM247 , UPC: 811071012478 , Code: 8Z-TDP-GTHM1-GTHM247
  • GrovTec US Metric Thread Protector, 15x1, Black, GTHM250 , MPN: GTHM250 , UPC: 811071012508 , Code: 8Z-TDP-GTHM1-GTHM250
  • GrovTec US Standard Thread Protector, 1/2x28, .920in, Black, GTHM243 , MPN: GTHM243 , UPC: 811071012430 , Code: 8Z-TDP-GTHM1-GTHM243
  • GrovTec US Metric Thread Protector, 14x1, Black, GTHM248 , MPN: GTHM248 , UPC: 811071012485 , Code: 8Z-TDP-GTHM1-GTHM248
  • GrovTec US Standard Thread Protector, 1/2x28, .700in, Black, GTHM245 , MPN: GTHM245 , UPC: 811071012454 , Code: 8Z-TDP-GTHM1-GTHM245
  • GrovTec US Standard Thread Protector, 1/2x28, .625in, Black, GTHM246 , MPN: GTHM246 , UPC: 811071012461 , Code: 8Z-TDP-GTHM1-GTHM246
  • GrovTec US Standard Thread Protector, 1/2x28, .641in, Black, GTHM244 , MPN: GTHM244 , UPC: 811071012447 , Code: 8Z-TDP-GTHM1-GTHM244

GrovTec US Standard Thread Protector Unavailable & Discontinued Models

List of Unorderable Models

  • Grovtec US Muzzle Thread Protector 14 X 1.5 Metric Threads GTHM249 , MPN: GTHM249 , UPC: 811071012492 , Code: 8Z-TDP-GTHM1-249
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Last updated 2026-07-22 UTC.