What's the Best Thread Locker?

Published on October 31, 2021
Duration: 15:55

This video provides an in-depth comparison of various thread locking compounds for firearms applications, specifically muzzle devices. Through controlled testing, it evaluates torque resistance and behavior under heat. The presenter, drawing on practical experience, highlights the importance of proper thread locker selection for ensuring the security and alignment of muzzle devices, especially when using suppressors.

Quick Summary

Rocksett is the recommended thread locker for firearms muzzle devices due to its superior performance under heat. Unlike compounds like Loctite Red or JB Weld, which degrade at high temperatures, Rocksett maintains its bond and is water-removable, ensuring secure mounting and preventing alignment issues.

Chapters

  1. 00:00Introduction: Thread Locker Testing
  2. 01:16Sponsor: Sonoran Desert Institute
  3. 02:14Test Matrix and Setup
  4. 03:03Phase 1: Torque Resistance (No Heat)
  5. 05:24Phase 1 Results and Analysis
  6. 06:26Phase 2: Testing with Heat
  7. 07:34Drying Observations (5 Days Later)
  8. 07:53Phase 2 Setup: Heating Devices
  9. 08:00Control Test with Heat
  10. 08:41Vibra-TITE Test with Heat
  11. 08:54JB Weld Test with Heat
  12. 09:10Loctite Red Test with Heat
  13. 09:36Temperature Verification
  14. 09:43Permatex Test with Heat
  15. 10:31Rocksett Test with Heat
  16. 10:38Phase 2 Results and Analysis
  17. 11:48Real-World Application: Suppressor Alignment
  18. 13:14Why Suppressor Alignment Matters
  19. 14:39Proper Suppressor Mount Installation (Nov 2021)
  20. 15:25Conclusion and Final Thoughts

Frequently Asked Questions

What is the best thread locker for firearms muzzle devices?

Based on testing, Rocksett is highly recommended for firearms muzzle devices, especially when heat is a factor. While Vibra-TITE showed higher torque resistance without heat, Rocksett maintained its integrity at 400°F, unlike other compounds which turned into lubricants. Rocksett is also water-removable, unlike heat-activated types.

How does heat affect common thread lockers on firearms?

Heat significantly degrades the holding power of most common thread lockers like Loctite Red and JB Weld. When heated to 400°F, these compounds often turn into lubricants, requiring minimal torque to remove. Rocksett, however, maintains its bond even under high heat, making it superior for applications like muzzle devices.

Should I use a crush washer or jam nut on my suppressor mount?

No, it is strongly advised against using crush washers or jam nuts on suppressor mounts. These can negatively impact alignment, leading to accuracy issues and potential damage to the suppressor or firearm. Shims should be used for timing muzzle brakes if necessary.

How do I properly install a suppressor mount?

Proper installation involves cleaning threads, applying a suitable seizing compound like Rocksett, torquing to manufacturer specifications, and using shims for timing if needed. Crucially, always use an alignment rod to confirm the suppressor is perfectly aligned with the firearm's bore to prevent damage and ensure accuracy.

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