Cutting Diameter Description Series Page Length 3.150 - 3.940 1.575 12Y1U_D (40mm) 576 Indexable Thread Mills - Shell Mill 1.060 .900 Indexable Thread Mills - Helical 22Y3Q (23mm) 578 End Mill 1.260 - Indexable Thread Mills - Helical 22Y3R (32mm) 579 End Mill 1.457 1.450 Indexable Thread Mills - Helical 22Y3S (37mm) 580 End Mill 1.496 1.490 Indexable Thread Mills - Helical 22Y3T (38mm) 581 End Mill GD .100 - 1.575 5.9 - 118.0 Single Flute Brazed Gun Drills 582 SPGD 40 x D .035 - .630 to Solid Carbide Gun Drills SCGD 583 7.874 L2 L3 L1 D1 D2 .125 - 1.000 10 - 60 Standard Brazed Gun Drills STGD 584 BTA Indexable Drill - 3 Cartridge, 1.496 - 4.212 100 x D Single Tube System - Outer Four TBTA3_SE4 597 Start Thread BTA Indexable Drill, 3 Cartridge 1.496 - 4.212 100 x D Inner Single Start Thread TBTA3_SI1 598 483