The GrovTec Thread Protector provides essential protection for your threaded barrel with a durable black oxide finish and precise 5/8x24 thread pitch.GrovTec Thread Protector for 300 Blackout and AR10 platforms5/8x24 thread pitch for secure attachment0.750 inch diameter fits standard barrel profilesBlack oxide finish for corrosion resistanceMade in the USA for quality assuranceEssential for maintaining your barrel threads in perfect working condition this thread protector ensures a lifetime of reliable performance for AR10 and 300 Blackout long gun applications.