D d D d AT-1 Advanced Performance One Pass Thread Mill List 16625 SPEEDNEWFEEDP679CARBIDEEgiAs11˚ SHANKh6 AT-1, Helical Flute Type 1 Type 2 Lc L1 L Lc L Cutter OverallSizeThreadsDiameterPer InchLengthLengthof CutNeckLengthShankDiameterNo. ofFlutesTypeEDP Number D L Lc L1 d EgiAs 20 0.600 0.700 1662500017 1/4 28 0.179 0.607 0.680 1662500117 3218 3 0.563 0.6250.7780.889 1/4 16625002171662500317 5/16 24 0.224 0.750 0.833 1 1662500417 32163/824 0.264 0.688 0.7500.8751.0000.958 4 166250051716625006171662500717 3214 0.813 0.8751.071- 5/16 16625008171662500917 7/16 20 0.303 3 1/2 1.000 - 2 1662501017 28 0.964 - 1662501117 13 1.154 1.308 1662501217 1/2 20 0.343 1.100 1.200 3/8 1662501317 28 1.107 1.178 1662501417 12 1.333 1.500 1662501517 9/16 18 0.382 1.278 1.389 1662501617 24 1.250 1.333 1662501717 11 1.454 1.636 1662501817 5/8 18 0.421 5 1.389 1.500 1/2 5 1662501917 2410 1.374 1.4581.7001.900 1 16625020171662502117 3/4 16 0.461 1.626 1.750 1662502217 20 1.600 1.700 1662502317 9 2.000 2.222 1662502417 7/8 14 0.539 5 1/2 1.928 2.071 5/8 1662502517 20 1.850 1.950 1662502617 8 2.250 2.500 1662502717 1 12 0.736 6 2.167 2.334 3/4 6 1662502817 20 2.100 2.200 1662502917 Packed: 1 pc. Available in EgiAs coating only. ATP For internal threads only. For more information on thread mill applications, including ThreadPro software, visit: www.osgtool.com/ThreadPro. Work Material P M K N S H Carbon Steels AlloyList No.Low10101018Med.10351045HighSteelsDie10654140Steels4340Stainless SteelsCast30040017-4 PHIronAluminumNickelAlloyTitaniumHardened Steels60617075CastingInconel6Al4V(30 HRC)~35HRC35-4545-5050-70HRCHRCHRC 16625 good best 358 Thread Mills WWW.OSGTOOL.COM