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Victory™ Solid Carbide Thread Mills • Blind and Through Holes
Victory™ Solid Carbide Thread Mills • Blind and Through Holes
Victory™ Solid Carbide Thread Mills • Blind and Through Holes
Victory™ Solid Carbide Thread Mills • Blind and Through Holes

GTM21 • Inch UNC • Through Coolant

Victory™ Solid Carbide Thread Mills • Blind and Through Holes

Uses and application

  • Counter Sinking/ Stroke ChamferingCounter Sinking/ Stroke Chamfering
  • Threading: Through HoleThreading: Through Hole
  • Threading: Blind HoleThreading: Blind Hole
  • HMHM
  • Drilling Depth: 2xDrilling Depth: 2x
  • Through Coolant: Axial: TappingThrough Coolant: Axial: Tapping
  • Manufacturer’s Specs: UNCManufacturer’s Specs: UNC
  • Manufacturer’s Specs: UNFManufacturer’s Specs: UNF

Workpiece Materials

P Steel
M Stainless Steel
K Cast Iron
N Non-Ferrous
S High-Temp Alloys
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Workpiece Material
  • P Steel (15)
    • P0
      Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS
      (15)
    • P1
      Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS
      (15)
    • P2
      Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS
      (15)
    • P3
      Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS
      (15)
    • P4
      Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS
      (15)
    • P5
      Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS
      (15)
  • M Stainless Steel (15)
    • M1
      Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS
      (15)
    • M2
      High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS
      (15)
  • K Cast Iron (15)
    • K1
      Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS
      (15)
    • K2
      Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS
      (15)
    • K3
      High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS
      (15)
  • N Non-Ferrous Materials (15)
    • N1
      Wrought Aluminum
      (15)
    • N2
      Low-Silicon Aluminum Alloys and Magnesium Alloys Si <12.2%
      (15)
    • N3
      High-Silicon Aluminum Alloys Si >12.2%
      (15)
    • N4
      Copper, Brass, Zinc-based on machinability index range of 70-100
      (15)
    • N5
      Nylon, Plastics, Rubbers, Phenolics, Resins, Fiberglass
      (15)
    • N6
      Carbon, Graphite Composites, CFRP
      (15)
  • S High-Temp Alloys (15)
    • S1
      Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS
      (15)
    • S2
      Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS
      (15)
    • S3
      Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS
      (15)
    • S4
      Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS
      (15)
Applications
  • Thread Milling Thread Milling (15)
Cutting Diameter
  • 3.8 (1)
  • 4.7 (1)
  • 5.15 (1)
  • 6.15 (1)
  • 6.6 (1)
  • 7.65 (1)
  • 8.2 (1)
  • 9.0 (1)
  • 9.55 (1)
  • 10.35 (1)
  • 11.1 (1)
  • 11.8 (1)
  • 12.5 (1)
  • 13.1 (1)
  • 14.1 (1)
to
Cutting Diameter
  • 0.1496 (1)
  • 0.185 (1)
  • 0.2028 (1)
  • 0.2421 (1)
  • 0.2598 (1)
  • 0.3012 (1)
  • 0.3228 (1)
  • 0.3543 (1)
  • 0.376 (1)
  • 0.4075 (1)
  • 0.437 (1)
  • 0.4646 (1)
  • 0.4921 (1)
  • 0.5157 (1)
  • 0.5551 (1)
to
Type of Thread
  • NC/UNC (7)
  • NF/UNF (8)
Connection Style
  • Straight-Cylindrical (15)
Corner configuration
Corner Radius
  • 0.0 (15)
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Corner Radius
  • 0.0 (15)
to
Corner Chamfer
  • 0.0 (15)
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Corner Chamfer
  • 0.0 (15)
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Application
Grade Of Cutting Tool
  • WU12PV (15)
Hand Of Tool
  • R (15)
Front-End
Thread TPI
  • 11.0 (1)
  • 12.0 (1)
  • 13.0 (1)
  • 14.0 (1)
  • 16.0 (1)
  • 18.0 (3)
  • 20.0 (3)
  • 24.0 (2)
  • 28.0 (1)
  • 32.0 (1)
to
Thread TPI
  • 11.0 (1)
  • 12.0 (1)
  • 13.0 (1)
  • 14.0 (1)
  • 16.0 (1)
  • 18.0 (3)
  • 20.0 (3)
  • 24.0 (2)
  • 28.0 (1)
  • 32.0 (1)
to
Back-End
Connection Type
  • CYLINDRICAL (15)
Back-End Diameter
  • 0.2362 (1)
  • 0.315 (2)
  • 0.3937 (2)
  • 0.4724 (4)
  • 0.5512 (2)
  • 0.6299 (2)
  • 0.7087 (2)
to
Back-End Diameter
  • 6.0 (1)
  • 8.0 (2)
  • 10.0 (2)
  • 12.0 (4)
  • 14.0 (2)
  • 16.0 (2)
  • 18.0 (2)
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other
Grade
  • WU12PV (15)
Platform
  • GTM21 (4)
Tool Unit
  • I (15)
Over All Length [L]
  • 55.0 (1)
  • 62.0 (2)
  • 74.0 (2)
  • 80.0 (4)
  • 90.0 (2)
  • 100.0 (2)
  • 102.0 (2)
to
Over All Length [L]
  • 2.1654 (1)
  • 2.4409 (2)
  • 2.9134 (2)
  • 3.1496 (4)
  • 3.5433 (2)
  • 3.937 (2)
  • 4.0157 (2)
to
obsoleteFacet
  • true (15)
  • false (4)
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Metric
Inch
SAP Material Number ISO Catalog Number ANSI Catalog Number Grade [TDZ] Thread Diameter Size [D1] Effective Cutting Diameter [D1] Effective Cutting Diameter [DCH] Chamfer Diameter [DCH] Chamfer Diameter [LTHD] Thread Length [LTHD] Thread Length [LDCH] Chamfer Length-Tool Front [LDCH] Chamfer Length-Tool Front [L] Overall Length [L] Overall Length [LS] Shank Length [LS] Shank Length [D] Adapter / Shank / Bore Diameter [D] Adapter / Shank / Bore Diameter Number of Effective Cutting Edges on Face
4138530 GTM215017 GTM215017 WU12PV 1/4-20 4.7000 .1850 6.6500 .2618 13.3600 .5260 14.2300 .5602 62.0000 2.440 36.0 1.417 8.0 .315 3
    4138531 GTM215018 GTM215018 WU12PV 5/16-18 6.1500 .2421 8.2500 .3248 16.2600 .6402 17.1900 .6768 74.0000 2.913 40.0 1.574 10.0 .3937 3
      4138532 GTM215019 GTM215019 WU12PV 3/8-16 7.6500 .3012 9.8300 .3870 19.8900 .7831 20.8500 .8209 80.0000 3.149 45.0 1.771 12.0 .4724 3
        4138533 GTM215020 GTM215020 WU12PV 7/16-14 9.0000 .3543 11.4300 .4500 22.7200 .8945 23.7900 .9366 80.0000 3.149 45.0 1.771 12.0 .4724 3
          4138534 GTM215021 GTM215021 WU12PV 1/2-13 10.3500 .4075 13.0000 .5118 26.4300 1.040 27.6000 1.086 90.0000 3.543 45.0 1.771 14.0 .5512 4
            4138535 GTM215022 GTM215022 WU12PV 9/16-12 11.8000 .4646 14.6100 .5752 30.7500 1.210 31.9900 1.259 100.0000 3.937 48.0 1.889 16.0 .6299 4
              4138536 GTM215023 GTM215023 WU12PV 5/8-11 13.1000 .5157 16.1800 .6370 33.5400 1.320 34.8900 1.373 102.0000 4.015 48.0 1.889 18.0 .7087 4
                4138537 GTM215024 GTM215024 WU12PV #10-32 3.8000 .1496 5.1300 .2020 9.9500 .3917 10.5300 .4146 55.0000 2.165 36.0 1.417 6.0 .2362 3
                  4138538 GTM215025 GTM215025 WU12PV 1/4-28 5.1500 .2028 6.6500 .2618 13.1900 .5193 13.8400 .5449 62.0000 2.440 36.0 1.417 8.0 .315 3
                    4138539 GTM215026 GTM215026 WU12PV 5/16-24 6.6000 .2598 8.2500 .3248 16.4400 .6472 17.1500 .6752 74.0000 2.913 40.0 1.574 10.0 .3937 3
                      4138540 GTM215027 GTM215027 WU12PV 3/8-24 8.2000 .3228 9.8300 .3870 19.6200 .7724 20.3100 .7996 80.0000 3.149 45.0 1.771 12.0 .4724 3
                        4138541 GTM215028 GTM215028 WU12PV 7/16-20 9.5500 .3760 11.4300 .4500 22.2800 .8772 23.0800 .9087 80.0000 3.149 45.0 1.771 12.0 .4724 3
                          4138542 GTM215029 GTM215029 WU12PV 1/2-20 11.1000 .4370 13.0000 .5118 26.1000 1.027 26.8900 1.058 90.0000 3.543 45.0 1.771 14.0 .5512 4
                            4138543 GTM215030 GTM215030 WU12PV 9/16-18 12.5000 .4921 14.6100 .5752 28.9900 1.141 29.8800 1.176 100.0000 3.937 48.0 1.889 16.0 .6299 4
                              4138544 GTM215031 GTM215031 WU12PV 5/8-18 14.1000 .5551 16.1800 .6370 33.2400 1.308 34.0900 1.342 102.0000 4.015 48.0 1.889 18.0 .7087 4
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                                Grades

                                • WU12PV

                                  Coated carbide. PVD fine-grain carbide substrate with high-hardness TiCN coating.
                                  Universal grade for thread milling most materials.

                                  P Steel
                                  M Stainless Steel
                                  K Cast Iron
                                  N Non-Ferrous
                                  S High-Temp Alloys
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