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Hilco Small High Speed Steel Drill Bits ~ Sizes from 1.0mm to 2.0mm

(Code: 0920)
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£ 12.75
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Hilco Small High Speed Steel Drill Bits ~ Sizes from 1.0mm to 2.0mm
 Part Number  Metric US Standard  use Tap QTY
20/156/0000 1.0mm .0400 (#60) 20/153/0000  2
20/157/0000 1.1mm .0430 (#57) 20/154/0000  2
20/158/0000 1.2mm .0465 (#56) 20/155/0000  2
20/170/0000 1.3mm
.0511 (#55) 20/169/0000  2
 20/176/0000 1.4mm .055 (#54) 20/169/0000  2
20/171/0000 1.5mm .059 (#53) 20/165/0000  2
20/122/0000 1.6mm .0625 (1/16)    2
20/172/0000 1.7mm .067 (#51)    2
20/178/0000 1.8mm .070 (#50)    2
20/173/0000 2.0mm
.078 (5/64)
   2

1.4mm is the most common sized screw in optical frames; therefore we recommend the 20/157/0000 drill bit to drill out broken screws.
you can then use 20/169/0000 tap to replenish the threads.