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Electrician's Wiki - Sems Machine Screws
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Sems Machine Screws
Machine Screws w/ Internal Lock Washer
Professional rating
☆☆☆☆☆

Recommended when it is desirable to hide the teeth for appearance or to prevent snagging. The washer/screw assembly makes this a locking screw. Provides good control in driving and is the most recommended drive.

Manufacturer Name: Copper State Bolt and Nut (8)
Location: Phoenix,  AZ , United States
Description: Wide Variety of Fasteners and Tools
Link to Website: http://www.copperstate.com/
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