Chapman Precision Gunsmith Screwdrivers & Bits

Reasons to Use Precision Gunsmith Screwdrivers On Your Firearms

Many gun manufacturers and gunsmiths use Loctite Blue 242 threadlocker on firearms to prevent screws from backing out due to recoil or vibration. Loctite Blue 242 is only meant for fasteners 1/4" to 3/4". The correct Loctite to use on fasteners smaller than 1/4" is Green Loctite 290, which is meant for fasteners 1/12" to 1/2". Most firearms do not have fasteners larger than 1/4" yet most gunsmithing literature references the incorrect Blue 242 loctite. 
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