These miniature lead screws are among the smallest commercially available, with diameters as small as 0.5mm! That's just under the size of a grain of sugar.
Helix Linear Technologies Blog, Lead Screws
Compound Lead Screw for American Pacemaker
Miniature Lead Screws Introducing The World's Smallest Lead, 43% OFF
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Mini Lead Screw w/Nut 9TL
Lathes, Mini 7x10/7x12 (C2) Replacement Parts 1298 This lead screw fits 7x10 mini lathes.
Lead Screw, Mini Lathe 7x10
Miniature Lead Screws Introducing The World's Smallest Lead, 43% OFF
Miniature Lead Screws Introducing The World's Smallest Lead Screws
Lead Screws - an overview
New high-precision miniature lead screws from Thomson meet demand for smallest application designs
We specialize in small set screws from M1 to M3 (miniature set screws/micro set screws).
Mini Lead Screws from China, Mini Lead Screws Manufacturer & Supplier - ALM
High-precision miniature lead screws meet demand for smallest application designs - Industrial News
Miniature Ball Screws Turn rotary motion into linear