Precision Drill Rod Sizes other than listed priced on application W1 481 Precision Ground and Polished Drill Rod AISI/SAE W1 is a versatile and less expensive tool steel that has superior machinability and maintains good wear resistance and toughness characteristics. Heat Treatment and Tempering Data available upon request W1 481 Precision Ground and Polished Drill Rod Nominal Analysis (AISI W1) Carbon ........................................................................ .90-1.05 Manganese .................................................................. .30-.50 Tolerances Size Range Diameter Length .124" round and less ± .0003" + 1/8"- 0 .125" to .499" ± .0005" + 1/8"- 0 .500" to 2" ± .0010" + 1/8"- 0 Letter Sizes Diameter Decimal 36" Length A 0.2340 68404 B 0.2380 68405 C 0.2420 68406 D 0.2460 68407 E 0.2500 68408 F 0.2570 68409 G 0.2610 68410 H 0.2660 68411 I 0.2720 68412 J 0.2770 68413 K 0.2810 68414 L 0.2900 68415 M 0.2950 68416 N 0.3020 68417 O 0.3160 68418 P 0.3230 68419 Q 0.3320 68420 R 0.3390 68421 S 0.3480 68422 T 0.3580 68423 U 0.3680 68424 V 0.3770 68425 W 0.3860 68426 X 0.3970 68427 Y 0.4040 68428 Z 0.4130 68429 Number Sizes Diameter Decimal 36" Length 52 0.0630 68430 51 0.0660 68431 50 0.0690 68432 49 0.0720 68433 48 0.0750 68434 47 0.0770 68435 46 0.0790 68436 45 0.0810 68437 44 0.0850 68438 43 0.0880 68439 42 0.0920 68440 41 0.0950 68441 40 0.0970 68442 39 0.0990 68443 38 0.1010 68444 37 0.1030 68445 36 0.1060 68446 35 0.1080 68447 34 0.1100 68448 33 0.1120 68449 32 0.1150 68450 31 0.1200 68451 30 0.1270 68452 29 0.1340 68453 28 0.1390 68454 27 0.1430 68455 Number Sizes Diameter Decimal 36" Length 26 0.1460 68456 25 0.1480 68457 24 0.1510 68458 23 0.1530 68459 22 0.1550 68460 21 0.1570 68461 20 0.1610 68462 19 0.1640 68463 18 0.1680 68464 17 0.1720 68465 16 0.1750 68466 15 0.1780 68467 14 0.1800 68468 13 0.1820 68469 12 0.1850 68470 11 0.1880 68471 10 0.1910 68472 9 0.1940 68473 8 0.1970 68474 7 0.1990 68475 6 0.2010 68476 5 0.2040 68477 4 0.2070 68478 3 0.2120 68479 2 0.2190 68480 1 0.2270 68481 567 starrett.com F la t S tock and D rill R od