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37
SOLID CARBIDE THREAD MILLS
BSP
British Straight Pipe
Internal / External
Minimum
Tool
Grades
Pitch Flutes D D1 L L1
Size* Description 323FG 323F
G1/16 - G1/8 BSP TMX 1/4 x .240-28 BSP 28 5 .250 .240 2.25 .5714 70328 78328
G1/4 - G3/8 BSP TMX 5/16 x .310-19 BSP 19 5 .312 .310 2.48 .7368 70329 78329
G1/2 - G3/4 BSP TMX 1/2 x .470-14 BSP 14 5 .500 .470 3.27 1.1428 70330 78330
G1" -G2" BSP TMX 5/8 x .620-11 BSP 11 6 .625 .620 3.62 1.3636 70331 78331
ISO
Metric Internal Threads
Standard Length
Minimum
Tool
Grades
Pitch Flutes D D1 L L1
Size* Description 323FG 323F
M 1.6 TMN 1/8 x .040 - 0.35 ISO 0.35 3 .125 .040 1.500 .0959 70400 78400
M 2 TMN 1/8 x .050 - 0.40 ISO 0.40 3 .125 .050 1.500 .1260 70401 78401
M 2.5 TMN 1/8 x .060 - 0.45 ISO 0.45 3 .125 .060 1.500 .1417 70402 78402
M 3 TMN 1/8 x .085 - 50 ISO 0.50 3 .125 .085 1.500 .1772 70403 78403
M 4 TMN 1/8 x .105 - 0.70 ISO 0.70 3 .125 .105 1.500 .2657 70404 78404
M 4.5 TMN 1/8 x .120 - 0.75 ISO 0.75 3 .125 .120 1.50 .2657 70405 78405
M 8 TMN 1/4 x .240 - 0.75 ISO 0.75 5 .250 .240 2.25 .5906 70406 78406
M 5 TMN 3/16 x .145 - 0.80 ISO 0.80 3 .187 .145 1.65 .3149 70407 78407
M 6 TMN 3/16 x .160 - 1.00 ISO 1.00 3 .187 .160 1.65 .3543 70408 78408
M 10 TMN 1/4 x .240 - 1.00 ISO 1.00 5 .250 .240 2.25 .5906 70424 78424
M 12 TMN 5/16 x .310 - 1.00 ISO 1.00 5 .312 .310 2.48 .7874 70409 78409
M 16 TMN 1/2 x .470 - 1.00 ISO 1.00 5 .500 .470 3.27 1.1811 70410 78410
M 8 TMN 1/4 x .200 - 1.25 ISO 1.25 3 .250 .200 2.25 .4921 70411 78411
M 10 TMN 1/4 x .240 - 1.50 ISO 1.50 5 .250 .240 2.25 .5906 70412 78412
M 14 TMN 3/8 x .370 - 1.50 ISO 1.50 5 .375 .370 2.84 .9449 70413 78413
M 18 TMN 1/2 x .470 - 1.50 ISO 1.50 5 .312 .310 2.48 .7578 70414 78414
M 12 TMN 5/16 x .310 - 1.75 ISO 1.75 5 .312 .310 2.48 .7578 70415 78415
M 14 TMN 3/8 x .370 - 2.00 ISO 2.00 5 .375 .370 2.84 .9449 70416 78416
M 16 TMN 1/2 x .437 - 2.00 ISO 2.00 5 .500 437 3.27 1.1811 70425 78425
M 18 TMN 1/2 x .470 - 2.00 ISO 2.00 5 .500 .470 3.27 1.1811 70417 78417
M 20 TMN 1/2 x .470 - 2.5 ISO 2.50 5 .500 .470 3.27 1.1811 70418 78418
M 24 TMN 5/8 x .620 - 3.00 ISO 3.00 6 .625 .620 3.62 1.4173 70419 78419
M 30 TMN 5/8 x .620 - 3.50 ISO 3.50 6 .625 .620 3.62 1.5157 70420 78420
M 36 TMN 5/8 x .620 - 4.00 ISO 4.00 6 .625 .620 3.62 1.5748 70421 78421
M 48 TMN 3/4 x .745 - 5.00 ISO 5.00 6 .750 .745 4.10 1.5748 70422 78422
M 64 TMN 3/4 x .745 - 6.00 ISO 6.00 6 .750 .745 4.10 1.4173 70423 78423
*Minimum Size: The smallest internal thread size that can be cut with a specific Thread Mill. All of the Tools above can be used to
cut larger diameter threads than the nominal size as long as the L1 dimension exceeds the full thread length. For adequate chip
clearance, tool diameter should not exceed 70% of the Minor Thread Diameter. For best results use the largest diameter tool that
meets these requirements. Contact Horizon Carbide Tool for additional information and Programming Recommendations.
HORIZON CARBIDE TOOL, INC. (480) 968-0957 FAX (480) 968-8042 info@horizoncarbide.com