The Thread Protector, 1/2 x 28 to 5/8x24 with Crush Washer Steel (2 Pack) is a set of precision-engineered components designed to protect firearm threads and ensure a secure fit for muzzle devices, suppressors, or other threaded accessories. Here's a detailed review based on its features and performance:Pros:Versatile Thread Size Compatibility: This thread protector offers a 1/2 x 28 to 5/8 x 24 thread conversion, making it compatible with a variety of firearm barrels that have different thread pitches. The ability to convert between these two common sizes allows users to use the same protector across multiple firearms or accessories with different threading.Durable Steel Construction: The protector is made of steel, which is a highly durable material that offers superior strength and resistance to wear and tear. Steel ensures that the protector can withstand heavy use and the constant stresses of repeated threading and unthreading, making it ideal for long-term use.Crush Washer Included: The crush washer is included in the package, which helps ensure a secure fit and prevents the protector from loosening due to vibrations or recoil during shooting. The crush washer also assists in achieving the correct torque, ensuring that the thread protector is properly tightened without damaging the threads.Protects Threads from Damage: The primary function of a thread protector is to safeguard the threads of your firearm’s barrel from dirt, debris, moisture, and physical damage when not in use. This protector does its job well by preventing the barrel threads from being exposed, which is crucial in preserving the integrity of the firearm’s threading system.Easy to Install and Remove: The design of this protector allows for simple installation and removal. It screws on and off without the need for specialized tools, making it convenient for users who need to remove or install it frequently. The threaded design ensures a secure fit, but the protector can be removed just as easily when needed.Two-Pack for Value: The package includes two protectors, which provides excellent value for money. This is particularly useful for gun owners with multiple firearms or those who want to keep an extra thread protector on hand as a backup.Compact and Lightweight: The protector is compact and lightweight, adding minimal bulk to your firearm while still providing solid protection. This makes it suitable for a variety of firearms, from rifles to handguns, without altering the overall handling or weight.Cons:No Additional Thread Pitch Options: While the 1/2 x 28 to 5/8 x 24 conversion is versatile for many users, some may require additional thread sizes, such as 1/2 x 36 or 1/2 x 20. If you're working with uncommon thread pitches, this product may not be compatible with all your firearms or accessories.Might Not Fit All Muzzle Devices Perfectly: Depending on the design and manufacturer of your muzzle device or suppressor, the thread protector may not be a perfect fit or may interfere with the function of certain accessories. Always check compatibility before use.Crush Washer Durability: The included crush washer is a consumable item that may wear out over time with repeated use. Some users may need to replace it periodically to maintain a proper seal, which adds an extra cost or inconvenience.Not for High-Torque Applications: While the thread protector is designed for everyday use and general protection, it may not be suitable for high-torque applications like when using a suppressor or heavy muzzle device. If additional torque or more robust locking mechanisms are required, a different type of thread protector or locking nut may be necessary.Overall Verdict:The Thread Protector, 1/2 x 28 to 5/8 x 24 with Crush Washer Steel (2 Pack) offers excellent value and functionality for firearm owners looking to protect their barrel threads and ensure a secure fit for their accessories. With its durable steel construction, compatibility with common thread sizes, and included crush washers, it serves as a reliable and cost-effective solution for preserving thread integrity. The two-pack provides additional value, making it a great choice for those with multiple firearms or looking for a backup. While it may not be suitable for all thread pitches or high-torque needs, it’s an ideal product for most everyday users.

These are useful for attaching a .30 cal device to a 5.56 (1/2 X 28 ) host.

1/2 x 28 to 5/8x24 with Crush Washer Steel is a thread converter for common 1/2 barrel to 5/8 muzzle brakes (or other attachments). I have a 5/8 muzzle brake that I wanted to install on my 5.56 rifle and these came in really handy.Pros:Common threads. These are the most common-sized threads so allow for reuse of attachments.Durable.Includes crush washer. The washer allows for setting up the desired torque for a tight fit.Well priced -ConsNot much. The shape may not work for some barrels (more likely for pistols) but those barrels may require a specialized converter anyway.