InsertBase

ANSI Insert Code Index — ISO 1832 Equivalents

Every ANSI shop-floor code in the cited catalogue, converted deterministically to the ISO 1832 designation that shares its geometry — with inscribed circle, thickness, nose radius and the model page for each code.

163 distinct ANSI codes · 163 ISO 1832 models · 13,199 cited catalogue rows. A code is listed only when the arithmetic reproduces the ISO model the catalogue row is cited against.

How to read an ANSI insert code

The four letters carry the same meaning as in ISO 1832: shape, clearance, tolerance and fixing. The three digits that follow are the size block, written in inch fractions rather than millimetres:

  • First digit — inscribed circle in eighths of an inch. A 4 is 4/8 in = 12.7 mm, the ISO 12 circle for a rhombic insert.
  • Second digit — thickness in sixteenths of an inch. A 3 is 3/16 in = 4.76 mm, the ISO 04 thickness.
  • Third digit — corner radius in sixty-fourths of an inch. A 2 is 2/64 in = 0.794 mm, rounded to the ISO 08 radius.

Put together, CNMG432 and CNMG120408 describe the same insert: 12.7 mm inscribed circle, 4.76 mm thickness, 0.8 mm nose radius. The shape letter still governs the conversion — a 4 circle is 12.7 mm for every shape, but the matching ISO size code differs because ISO numbers each shape family separately, so WNMG432 is WNMG080408, not WNMG120408.

Letters after the size block — CNMG432RP, CNMG432MP — are chipbreaker or grade suffixes. They change chip control, not the geometry on this page. The ANSI vs ISO conversion guide covers the traps in more detail, and the ISO 1832 decoder will decode either notation side by side.

Find cross-brand equivalents → Decode an ISO or ANSI code → Read the conversion guide →

C — Rhombic (diamond) insert, 80° included angle

43 catalogued ANSI size codes. Each row links to the ISO model page, where the cited brand ordering codes and grades are listed.

ANSI code ISO 1832 d1 s rε Brands Cited rows
CCGT431 CCGT120404 12.7 mm 4.76 mm 0.4 mm Kennametal, Korloy 15
CCGT432 CCGT120408 12.7 mm 4.76 mm 0.8 mm Kennametal, Korloy 14
CCGT433 CCGT120412 12.7 mm 4.76 mm 1.2 mm Korloy 1
CCMT431 CCMT120404 12.7 mm 4.76 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 121
CCMT432 CCMT120408 12.7 mm 4.76 mm 0.8 mm Kennametal, Sandvik Coromant, Korloy 179
CCMT433 CCMT120412 12.7 mm 4.76 mm 1.2 mm Kennametal, Korloy 62
CNGA431 CNGA120404 12.7 mm 4.76 mm 0.4 mm Kennametal 14
CNGA432 CNGA120408 12.7 mm 4.76 mm 0.8 mm Kennametal 54
CNGA433 CNGA120412 12.7 mm 4.76 mm 1.2 mm Kennametal 55
CNGA543 CNGA160612 15.875 mm 6.35 mm 1.2 mm Kennametal 12
CNGG431 CNGG120404 12.7 mm 4.76 mm 0.4 mm Kennametal 13
CNGG432 CNGG120408 12.7 mm 4.76 mm 0.8 mm Kennametal 12
CNMA431 CNMA120404 12.7 mm 4.76 mm 0.4 mm Kennametal 14
CNMA432 CNMA120408 12.7 mm 4.76 mm 0.8 mm Kennametal 36
CNMA433 CNMA120412 12.7 mm 4.76 mm 1.2 mm Kennametal 28
CNMA434 CNMA120416 12.7 mm 4.76 mm 1.6 mm Kennametal 17
CNMA542 CNMA160608 15.875 mm 6.35 mm 0.8 mm Kennametal 6
CNMA543 CNMA160612 15.875 mm 6.35 mm 1.2 mm Kennametal 21
CNMA544 CNMA160616 15.875 mm 6.35 mm 1.6 mm Kennametal 17
CNMA642 CNMA190608 19.05 mm 6.35 mm 0.8 mm Kennametal 5
CNMA643 CNMA190612 19.05 mm 6.35 mm 1.2 mm Kennametal 18
CNMA644 CNMA190616 19.05 mm 6.35 mm 1.6 mm Kennametal 15
CNMG321 CNMG090304 9.525 mm 3.18 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 76
CNMG322 CNMG090308 9.525 mm 3.18 mm 0.8 mm Kennametal, Sandvik Coromant, Korloy 100
CNMG331 CNMG090404 9.525 mm 4.76 mm 0.4 mm Korloy 2
CNMG332 CNMG090408 9.525 mm 4.76 mm 0.8 mm Kennametal, Korloy 6
CNMG431 CNMG120404 12.7 mm 4.76 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 379
CNMG432 CNMG120408 12.7 mm 4.76 mm 0.8 mm Kennametal, Sandvik Coromant, Korloy 634
CNMG433 CNMG120412 12.7 mm 4.76 mm 1.2 mm Kennametal, Sandvik Coromant, Korloy 517
CNMG434 CNMG120416 12.7 mm 4.76 mm 1.6 mm Kennametal, Korloy 171
CNMG542 CNMG160608 15.875 mm 6.35 mm 0.8 mm Kennametal, Sandvik Coromant, Korloy 194
CNMG543 CNMG160612 15.875 mm 6.35 mm 1.2 mm Kennametal, Sandvik Coromant, Korloy 294
CNMG544 CNMG160616 15.875 mm 6.35 mm 1.6 mm Korloy 20
CNMG641 CNMG190604 19.05 mm 6.35 mm 0.4 mm Korloy 4
CNMG642 CNMG190608 19.05 mm 6.35 mm 0.8 mm Korloy 29
CNMG643 CNMG190612 19.05 mm 6.35 mm 1.2 mm Korloy 45
CNMG644 CNMG190616 19.05 mm 6.35 mm 1.6 mm Kennametal, Sandvik Coromant, Korloy 217
CNMG646 CNMG190624 19.05 mm 6.35 mm 2.4 mm Kennametal, Korloy 24
CNMG856 CNMG250724 25.4 mm 7.94 mm 2.4 mm Korloy 3
CNMG866 CNMG250924 25.4 mm 9.52 mm 2.4 mm Kennametal, Korloy 17
CNMM543 CNMM160612 15.875 mm 6.35 mm 1.2 mm Kennametal 32
CNMM644 CNMM190616 19.05 mm 6.35 mm 1.6 mm Kennametal 48
CNMM866 CNMM250924 25.4 mm 9.52 mm 2.4 mm Kennametal 29

D — Rhombic (diamond) insert, 55° included angle

24 catalogued ANSI size codes. Each row links to the ISO model page, where the cited brand ordering codes and grades are listed.

ANSI code ISO 1832 d1 s rε Brands Cited rows
DCMT431 DCMT150404 12.7 mm 4.76 mm 0.4 mm Kennametal 26
DCMT432 DCMT150408 12.7 mm 4.76 mm 0.8 mm Kennametal 38
DNGA431 DNGA150404 12.7 mm 4.76 mm 0.4 mm Kennametal 14
DNGA432 DNGA150408 12.7 mm 4.76 mm 0.8 mm Kennametal 37
DNGG431 DNGG150404 12.7 mm 4.76 mm 0.4 mm Kennametal 12
DNGG432 DNGG150408 12.7 mm 4.76 mm 0.8 mm Kennametal 13
DNGG441 DNGG150604 12.7 mm 6.35 mm 0.4 mm Kennametal 5
DNGG442 DNGG150608 12.7 mm 6.35 mm 0.8 mm Kennametal 5
DNMA432 DNMA150408 12.7 mm 4.76 mm 0.8 mm Kennametal 13
DNMA433 DNMA150412 12.7 mm 4.76 mm 1.2 mm Kennametal 16
DNMA442 DNMA150608 12.7 mm 6.35 mm 0.8 mm Kennametal 10
DNMA443 DNMA150612 12.7 mm 6.35 mm 1.2 mm Kennametal 10
DNMG331 DNMG110404 9.525 mm 4.76 mm 0.4 mm Kennametal, Sandvik Coromant, Korloy 153
DNMG332 DNMG110408 9.525 mm 4.76 mm 0.8 mm Kennametal, Sandvik Coromant, Korloy 242
DNMG333 DNMG110412 9.525 mm 4.76 mm 1.2 mm Sandvik Coromant, Korloy 21
DNMG431 DNMG150404 12.7 mm 4.76 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 290
DNMG432 DNMG150408 12.7 mm 4.76 mm 0.8 mm Kennametal, Korloy, Sandvik Coromant 485
DNMG433 DNMG150412 12.7 mm 4.76 mm 1.2 mm Korloy, Sandvik Coromant 120
DNMG434 DNMG150416 12.7 mm 4.76 mm 1.6 mm Kennametal, Korloy 37
DNMG441 DNMG150604 12.7 mm 6.35 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 283
DNMG442 DNMG150608 12.7 mm 6.35 mm 0.8 mm Kennametal, Korloy, Sandvik Coromant 497
DNMG443 DNMG150612 12.7 mm 6.35 mm 1.2 mm Kennametal, Sandvik Coromant, Korloy 382
DNMG444 DNMG150616 12.7 mm 6.35 mm 1.6 mm Kennametal, Korloy 65
DNMG542 DNMG190608 15.875 mm 6.35 mm 0.8 mm Kennametal, Sandvik Coromant 20

S — Square insert, 90° cutting edge angle

39 catalogued ANSI size codes. Each row links to the ISO model page, where the cited brand ordering codes and grades are listed.

ANSI code ISO 1832 d1 s rε Brands Cited rows
SCGT432 SCGT120408 12.7 mm 4.76 mm 0.8 mm Korloy, Kennametal 6
SCGT434 SCGT120416 12.7 mm 4.76 mm 1.6 mm Korloy 2
SCMT432 SCMT120408 12.7 mm 4.76 mm 0.8 mm Kennametal, Sandvik Coromant, Korloy 148
SNGA432 SNGA120408 12.7 mm 4.76 mm 0.8 mm Kennametal 17
SNGA433 SNGA120412 12.7 mm 4.76 mm 1.2 mm Kennametal 23
SNMA322 SNMA090308 9.525 mm 3.18 mm 0.8 mm Kennametal 4
SNMA432 SNMA120408 12.7 mm 4.76 mm 0.8 mm Kennametal 22
SNMA433 SNMA120412 12.7 mm 4.76 mm 1.2 mm Kennametal 28
SNMA434 SNMA120416 12.7 mm 4.76 mm 1.6 mm Kennametal 17
SNMA543 SNMA150612 15.875 mm 6.35 mm 1.2 mm Kennametal 16
SNMA544 SNMA150616 15.875 mm 6.35 mm 1.6 mm Kennametal 6
SNMA643 SNMA190612 19.05 mm 6.35 mm 1.2 mm Kennametal 16
SNMA644 SNMA190616 19.05 mm 6.35 mm 1.6 mm Kennametal 16
SNMG321 SNMG090304 9.525 mm 3.18 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 38
SNMG322 SNMG090308 9.525 mm 3.18 mm 0.8 mm Kennametal, Korloy, Sandvik Coromant 67
SNMG331 SNMG090404 9.525 mm 4.76 mm 0.4 mm Korloy 5
SNMG332 SNMG090408 9.525 mm 4.76 mm 0.8 mm Korloy 5
SNMG333 SNMG090412 9.525 mm 4.76 mm 1.2 mm Kennametal, Korloy 10
SNMG431 SNMG120404 12.7 mm 4.76 mm 0.4 mm Korloy, Kennametal 120
SNMG432 SNMG120408 12.7 mm 4.76 mm 0.8 mm Kennametal, Korloy, Sandvik Coromant 392
SNMG433 SNMG120412 12.7 mm 4.76 mm 1.2 mm Kennametal, Sandvik Coromant, Korloy 343
SNMG434 SNMG120416 12.7 mm 4.76 mm 1.6 mm Sandvik Coromant, Korloy 56
SNMG435 SNMG120420 12.7 mm 4.76 mm 2 mm Korloy 1
SNMG542 SNMG150608 15.875 mm 6.35 mm 0.8 mm Kennametal, Korloy 33
SNMG543 SNMG150612 15.875 mm 6.35 mm 1.2 mm Kennametal, Sandvik Coromant, Korloy 183
SNMG544 SNMG150616 15.875 mm 6.35 mm 1.6 mm Sandvik Coromant, Korloy 47
SNMG642 SNMG190608 19.05 mm 6.35 mm 0.8 mm Korloy, Kennametal 35
SNMG643 SNMG190612 19.05 mm 6.35 mm 1.2 mm Kennametal, Sandvik Coromant, Korloy 197
SNMG644 SNMG190616 19.05 mm 6.35 mm 1.6 mm Kennametal, Korloy 131
SNMG646 SNMG190624 19.05 mm 6.35 mm 2.4 mm Kennametal, Korloy 15
SNMG854 SNMG250716 25.4 mm 7.94 mm 1.6 mm Korloy 4
SNMG856 SNMG250724 25.4 mm 7.94 mm 2.4 mm Korloy 7
SNMG866 SNMG250924 25.4 mm 9.52 mm 2.4 mm Korloy 11
SNMM432 SNMM120408 12.7 mm 4.76 mm 0.8 mm Kennametal 16
SNMM433 SNMM120412 12.7 mm 4.76 mm 1.2 mm Kennametal 16
SNMM543 SNMM150612 15.875 mm 6.35 mm 1.2 mm Kennametal 20
SNMM643 SNMM190612 19.05 mm 6.35 mm 1.2 mm Kennametal 28
SNMM856 SNMM250724 25.4 mm 7.94 mm 2.4 mm Kennametal 35
SNMM866 SNMM250924 25.4 mm 9.52 mm 2.4 mm Kennametal 30

T — Triangular insert, 60° cutting edge angle

24 catalogued ANSI size codes. Each row links to the ISO model page, where the cited brand ordering codes and grades are listed.

ANSI code ISO 1832 d1 s rε Brands Cited rows
TNGA332 TNGA160408 9.525 mm 4.76 mm 0.8 mm Kennametal 19
TNGG331 TNGG160404 9.525 mm 4.76 mm 0.4 mm Kennametal 11
TNGG332 TNGG160408 9.525 mm 4.76 mm 0.8 mm Kennametal 8
TNGG431 TNGG220404 12.7 mm 4.76 mm 0.4 mm Kennametal 3
TNGN222 TNGN110308 6.35 mm 3.18 mm 0.8 mm Kennametal 2
TNMA331 TNMA160404 9.525 mm 4.76 mm 0.4 mm Kennametal 2
TNMA432 TNMA220408 12.7 mm 4.76 mm 0.8 mm Kennametal 23
TNMG221 TNMG110304 6.35 mm 3.18 mm 0.4 mm Kennametal, Korloy 25
TNMG222 TNMG110308 6.35 mm 3.18 mm 0.8 mm Kennametal, Korloy 28
TNMG321 TNMG160304 9.525 mm 3.18 mm 0.4 mm Kennametal 3
TNMG322 TNMG160308 9.525 mm 3.18 mm 0.8 mm Kennametal 3
TNMG331 TNMG160404 9.525 mm 4.76 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 274
TNMG332 TNMG160408 9.525 mm 4.76 mm 0.8 mm Kennametal, Korloy, Sandvik Coromant 454
TNMG333 TNMG160412 9.525 mm 4.76 mm 1.2 mm Korloy, Sandvik Coromant 145
TNMG334 TNMG160416 9.525 mm 4.76 mm 1.6 mm Kennametal, Korloy 27
TNMG431 TNMG220404 12.7 mm 4.76 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 93
TNMG432 TNMG220408 12.7 mm 4.76 mm 0.8 mm Kennametal, Korloy, Sandvik Coromant 276
TNMG433 TNMG220412 12.7 mm 4.76 mm 1.2 mm Sandvik Coromant, Korloy 75
TNMG434 TNMG220416 12.7 mm 4.76 mm 1.6 mm Kennametal, Korloy 88
TNMM434 TNMM220416 12.7 mm 4.76 mm 1.6 mm Kennametal 16
TPGR221 TPGR110304 6.35 mm 3.18 mm 0.4 mm Kennametal 5
TPMR321 TPMR160304 9.525 mm 3.18 mm 0.4 mm Kennametal 19
TPMR322 TPMR160308 9.525 mm 3.18 mm 0.8 mm Kennametal 16
TPMR323 TPMR160312 9.525 mm 3.18 mm 1.2 mm Kennametal 4

V — Rhombic (diamond) insert, 35° included angle

21 catalogued ANSI size codes. Each row links to the ISO model page, where the cited brand ordering codes and grades are listed.

ANSI code ISO 1832 d1 s rε Brands Cited rows
VBET221 VBET110304 6.35 mm 3.18 mm 0.4 mm Kennametal 4
VBGT331 VBGT160404 9.525 mm 4.76 mm 0.4 mm Kennametal 25
VBMT221 VBMT110304 6.35 mm 3.18 mm 0.4 mm Kennametal, Korloy 64
VBMT331 VBMT160404 9.525 mm 4.76 mm 0.4 mm Kennametal, Korloy 128
VBMT332 VBMT160408 9.525 mm 4.76 mm 0.8 mm Kennametal, Korloy 131
VBMT333 VBMT160412 9.525 mm 4.76 mm 1.2 mm Korloy, Kennametal 40
VCGT221 VCGT110304 6.35 mm 3.18 mm 0.4 mm Kennametal 1
VCMT221 VCMT110304 6.35 mm 3.18 mm 0.4 mm Sandvik Coromant, Korloy 25
VCMT222 VCMT110308 6.35 mm 3.18 mm 0.8 mm Sandvik Coromant 8
VCMT331 VCMT160404 9.525 mm 4.76 mm 0.4 mm Korloy, Kennametal 31
VCMT332 VCMT160408 9.525 mm 4.76 mm 0.8 mm Korloy 26
VCMT333 VCMT160412 9.525 mm 4.76 mm 1.2 mm Korloy 8
VNGA331 VNGA160404 9.525 mm 4.76 mm 0.4 mm Kennametal 10
VNGA332 VNGA160408 9.525 mm 4.76 mm 0.8 mm Kennametal 24
VNGG331 VNGG160404 9.525 mm 4.76 mm 0.4 mm Kennametal 14
VNMA332 VNMA160408 9.525 mm 4.76 mm 0.8 mm Kennametal 13
VNMG331 VNMG160404 9.525 mm 4.76 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 243
VNMG332 VNMG160408 9.525 mm 4.76 mm 0.8 mm Kennametal, Korloy, Sandvik Coromant 340
VNMG333 VNMG160412 9.525 mm 4.76 mm 1.2 mm Kennametal, Korloy 109
VNMG431 VNMG220404 12.7 mm 4.76 mm 0.4 mm Kennametal, Korloy 13
VNMG432 VNMG220408 12.7 mm 4.76 mm 0.8 mm Kennametal, Korloy 36

W — Trigon insert, 80° included angle (six cutting edges)

12 catalogued ANSI size codes. Each row links to the ISO model page, where the cited brand ordering codes and grades are listed.

ANSI code ISO 1832 d1 s rε Brands Cited rows
WNGA432 WNGA080408 12.7 mm 4.76 mm 0.8 mm Kennametal 12
WNGG431 WNGG080404 12.7 mm 4.76 mm 0.4 mm Kennametal 8
WNGG432 WNGG080408 12.7 mm 4.76 mm 0.8 mm Kennametal 9
WNMA333 WNMA060412 9.525 mm 4.76 mm 1.2 mm Kennametal 6
WNMA432 WNMA080408 12.7 mm 4.76 mm 0.8 mm Kennametal 15
WNMG331 WNMG060404 9.525 mm 4.76 mm 0.4 mm Kennametal, Korloy, Sandvik Coromant 139
WNMG332 WNMG060408 9.525 mm 4.76 mm 0.8 mm Kennametal, Sandvik Coromant, Korloy 283
WNMG333 WNMG060412 9.525 mm 4.76 mm 1.2 mm Kennametal, Korloy 93
WNMG431 WNMG080404 12.7 mm 4.76 mm 0.4 mm Korloy, Kennametal, Sandvik Coromant 213
WNMG432 WNMG080408 12.7 mm 4.76 mm 0.8 mm Kennametal, Sandvik Coromant, Korloy 507
WNMG433 WNMG080412 12.7 mm 4.76 mm 1.2 mm Kennametal, Sandvik Coromant, Korloy 388
WNMG434 WNMG080416 12.7 mm 4.76 mm 1.6 mm Kennametal, Korloy 84

ANSI code questions

Is CNMG432 the same insert as CNMG120408?

Yes for geometry. Both describe a 12.7 mm inscribed circle, 4.76 mm thickness and 0.8 mm corner radius with an 80° rhombic shape, so either designation fits the same pocket. CNMG432 is ANSI shop-floor shorthand; CNMG120408 is the ISO 1832 designation. The full ordering code still includes the chipbreaker and grade, which do differ between manufacturers.

Why is WNMG432 not the same as WNMG120408?

ANSI size digits are inch fractions and convert to the same physical size for every shape, but ISO 1832 numbers each shape family separately. A 4/8 in circle is 12.7 mm, and for the W (trigon) family the matching ISO size code is 08, not 12. The same ANSI block therefore becomes WNMG080408. Converting without checking the shape letter would produce a code that does not exist.

What do the three digits in an ANSI insert code mean?

The first digit is the inscribed circle in eighths of an inch, the second is the thickness in sixteenths, and the third is the corner radius in sixty-fourths. CNMG432 is therefore 4/8 in circle, 3/16 in thickness and 2/64 in radius, which round to 12.7 mm, 4.76 mm and 0.8 mm.

Can I substitute a CNMG432 from any brand?

The geometry is interchangeable under ISO 1832, but the grade and chipbreaker are not. Match the ISO 513 workpiece group and application band before substituting, and confirm the full manufacturer code against its catalogue. InsertBase marks each equivalent FULL, PARTIAL or VERIFY so the level of confirmation is visible before ordering.

What this index does and does not claim

Every row above comes from a manufacturer ordering code stored with a catalogue source, version and date. The ANSI-to-ISO conversion is arithmetic on the inch-based size block, checked against the ISO 1832 tables — it is not a guessed cross-reference. Rows are omitted when the conversion does not reproduce the ISO model, or when a catalogue uses a four-digit positive-insert block that cannot be converted mechanically.

ANSI codes are shop-floor shorthand, not a complete ordering code. Before ordering, confirm the full manufacturer code — chipbreaker and grade included — against the catalogue record linked from the model page. The editorial policy explains how records are sourced and how corrections are handled.

Need a code that is not listed? Search the cross-reference finder or paste it into the ISO 1832 decoder; if neither recognises it, the verification request comes back with the catalogue row it is based on.