23 rows Machine Screw Size Chart and Conversion Tables A #8 screw size is .164 fraction of an inch. The diameters listed in the chart below are in fractions of an inch, so the #12 is just shy of 1/4 inch. Feb 15, 2010 What Are The Smallest Screws In Use? I have taken up the hobby of restoring old watches. The screws used to hold watch movements together are quite small -some of them are 0.010 in diameter. This site (with video) claims they make the world's smallest screw . The size is 0.3mm, which is around 0.0118 in. Reply With Quote # Understanding Screw Sizes – Inch Standards Screws with a diameter smaller than 1/4 have a nominal size indicated by a number (e.g. #8 or #10). 1/4 and larger diameters are shown as inches.

The smallest diameter screw is 0, and heremonly available is 24. For bench work, the most useful sizes are 4 through 12. Of those sizes , 6, 8, and 10 are probably used more than any others. Guide to Fastener Sizes . Understanding Standard Size Dimensions. These industry Numeric Sizes run from #0 through #15, with #0 the smallest and #15 the largest. A Number 6 size (sheet metal screws , Teks screws , drywall screws , particle board screws , wood screws , U-drive screws ) Steel Self-Drilling Screw , Black Phosphate Finish, Modified Truss Head, Phillips Drive, #2 Drill Point, #8-18 Thread Size , 1-1/4 Length (Pack of 100) by Small Parts Misc.

Manufacturer of Miniature Screws , Small Screws Miniature Fasteners For almost 100 years, the J.I. Morris name has been recognized as a leader in the fields of miniature screws and optical polishing. and washers from 0000-160 to 2-56 and Unified Miniature thread sizes from 0.5 UNM to 1.4 UNM.