Sapphire Tip, Fine-Adjustment Screws
Adding to the top quality and smooth adjustments of the 200 TPI fine-adjustment screws, these Sapphire-Tipped fine-adjustment sets offer extremely low friction when used against another hard surface, are nearly impervious to scratching or denting, and are chemically inert, making them ideal for harsh environments where exposure to acids, alkalis, or extreme temperatures may occur. Our sapphire tip fine-adjustment screw and bushing sets are normally delivered within one week, made to order in the USA 
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