Countersink Modeling and Selectable Sizes

Metric Thickness Gauge Standard

Modeling Rules for Countersunk Holes

When a conical shape element is detected, it will be identified as a countersink.
Modeling Rules Example
Model the angle of the conical shape to be 90°. The ratio between the outer hole diameter (D) and inner hole diameter (d) must be as follows: If d ≤ 4.0 mm, the ratio must be above 1.4, If d > 4.0 mm, the ratio must be above 1.7. Example

Countersunk Hole Identification

The countersunk hole is recognized through two steps below.

STEP1

  • The pilot hole diameters for countersunk holes for each CAD package are registered in the meviy hole information database. Detected hole diameters will be checked against this during modeling (see table below).

Countersunk Hole Nominal Diameter File Extension
STEP (.step / .stp) Parasolid (.x_t/.x_b/.xmt /.xmt_txt) ACIS (.sat/.sab) JT (.jt) PRC (.prc) I-deas (.arc/.unv) Autodesk Inventor (.ipt) CATIA V5 (.CATPart) Siemens PLM-NX (.prt) *1 Creo (.neu/.prt/.xpr) Solid Edge (.par/.pwd) iCAD SX (.icd) SOLIDWORKS (.sldprt) Siemens PLM-NX (.prt) *2
M3 3.20 3.30 3.40 3.58 3.6 4.00 3.20 3.30 3.40
M4 4.30 4.40 4.50 4.60 4.68 4.80 4.30 4.40 4.50
M5 5.30 5.50 5.80 6.00 6.18 6.50 5.30 5.50 5.50
M6 6.40 6.60 6.82 7.00 – – 6.40 6.60 6.60
M8 8.40 8.54 9.00 9.22 10.00 – 8.40 8.54 9.00
M10 10.50 10.62 11.00 11.27 12.00 – 10.50 10.62 11.00
M12 13.00 13.50 14.50 － － － 13.00 － 13.50
M14 15.00 15.50 16.50 － － － － － －
M16 17.00 17.50 18.50 － － － 17.00 － 17.50
  • *1 Pilot hole diameter for Siemens PLM-NX JIS model
  • *2 Pilot hole diameter for Siemens PLM-NX ISO model

STEP2

  • Once the countersunk hole is recognized according to the aforementioned modeling rules, the nominal diameter is determined according to the pilot hole diameter range. (Table below)
  • If the detected hole diameter does not match any of the entries on the list of pilot hole diameters, the hole is treated as a through hole (or tapped hole).

    However, you can change the hole type or hole diameter when configuring the quote settings.

Countersunk diameter Pilot hole(d) range Example
M3 3.2≦d≦4.0 Example
M4 4.3≦d≦4.8
M5 5.3≦d≦6.5
M6 6.3≦d≦7.0
M8 8.4≦d≦10.0
M10 10.5≦d≦12.0
M12 13.0≦d≦14.5
M14 15.0≦d≦16.5
M16 17.0≦d≦18.5

Countersunk Hole Size Selection for Inch Thickness Gauge Standard

  • Available sizes vary depending on material and Sheet Thickness. See the table below for details.
  • Countersunk holes cannot be selected for perforated metals or shim plate materials. Inch sized tapped hole is not available.
Material Sheet Thickness (inch) (mm) Available Bolt Nominal Diameter
  • Cold Rolled Low Carbon Steel
  • Hot Rolled Low Carbon Steel
 0.0179 (#26) 0.454
0.0239 (#24) 0.607
0.0299 (#22) 0.759
0.0359 (#20) 0.912
0.0418 (#19) 1.062
0.0478 (#18) 1.214
0.0538 (#17) 1.367
0.0598 (#16) 1.519
0.0747 (#14) 1.897 M3
0.0897 (#13) 2.278 M3
0.1046 (#12) 2.657 M3 M4
0.1196 (#11) 3.038 M3 M4 M5
0.1345 (#10) 3.416 M3 M4 M5
0.1644 (#8) 4.175 M3 M4 M5 M6
0.1793 (#7) 4.554 M3 M4 M5 M6
0.1943 (#6) 4.935 M3 M4 M5 M6 M8
0.250 6.35 M3 M4 M5 M6 M8
0.375 9.525 M3 M4 M5 M6 M8
  • Cold Rolled Low Carbon Steel
    (Electrolytic Galvanized)
  • Cold Rolled Low Carbon Steel
    (Hot Galvanized)
 0.0276″ (#24) 0.607
0.0336″ (#22) 0.759
0.0396″ (#20) 0.912
0.0516 (#18) 1.214
0.0635″ (#16) 1.519
0.0785″ (#14) 1.897 M3
  • 304 Stainless Steel (2B)
  • 304 Stainless Steel (No.4)
  • 316 Stainless Steel (2B)
 0.01875″ (#26) 0.475
0.025″ (#24) 0.635
0.0312″ (#22) 0.892
 0.0375″ (#20), 0.952
0.0437″ (#19), 1.110
0.0500″ (#18) 1.270
0.0562″ (#17) 1.427
0.0625″ (#16), 1.587
0.0781″ (#14) 1.983 M3
 0.0937″ (#13), 2.379 M3
0.1094″ (#12), 2.778 M3 M4
0.1250″ (#11) 3.175 M3 M4 M5
 0.1406″ (#10), 3.571 M3 M4 M5
0.1719″ (#8), 4.366 M3 M4 M5 M6
0.1875″ (#7) 4.762 M3 M4 M5 M6
 0.2500″ (#3) 6.350
  • 5052 Aluminum Alloy
  • 6061 Aluminum Alloy
 0.020″ 0.508
0.025″ 0.635
0.032″ 0.813
0.040″ 1.016
0.050″ 1.270
0.080″ 2.032 M3
0.090″ 2.286 M3
0.100″ 2.540 M3 M4
0.125″ 3.175 M3 M4 M5
0.160″ 4.064 M3 M4 M5 M6
0.190″ 4.826 M3 M4 M5 M6 M8
0.250″ 6.35 M3 M4 M5 M6 M8 M10
*Only available for A5052 Aluminum Alloy.

Countersunk Hole Size Selection for Metric Thickness Gauge Standard

  • Available sizes vary depending on material and Sheet Thickness. See the table below for details.
  • Countersunk holes cannot be selected for perforated metals or shim plate materials (Cold Rolled Low Carbon Steel (for Shims) or 304 Stainless Steel (H) (for Shims)).
Material Sheet Thickness Countersunk Hole Bolt Nominal Diameter
  • Low Carbon Steel (Cold/Hot Rolled)
  • 1018 Carbon Steel
  • Cold Rolled Low Carbon Steel (Electrolytic Zinc Plating)
 2.0 M3
2.3 M3
3.2 M3 M4 M5
4.5 M3 M4 M5 M6
6.0 M3 M4 M5 M6 M8 M10
9.0 M5 M6 M8 M10
10.0 M5 M6 M8 M10 M12 M14 M16
12.0 M5 M6 M8 M10 M12 M14 M16
16.0 M5 M6 M8 M10 M12 M14 M16
  • 304 Stainless Steel
  • (No.1 / 2B / Single-Sided #400-Grit Polished / Single-sided hairline finish)
  • 430 Stainless Steel (2B)
  • 5052 Aluminum Alloy
  • 5052 AL Alloy Pre-Finish, Clear Anodize​
  • 5052 AL Alloy Pre-Finish, Black Anodize​
 2.0 M3
2.5 M3
3.0 M3 M4 M5
4.0 M3 M4 M5 M6
5.0 M3 M4 M5 M6 M8
6.0 M3 (*1) M4 M5 M6 M8
9.0 M5 M6 M8 M10 M12 M14 M16
10.0 M5 M6 M8 M10 M12 M14 M16
12.0 M5 M6 M8 M10 M12 M14 M16
PET Acrylic Polycarbonate PVC 3.0 M3 M4 M5
5.0 M3 M4 M5 M6 M8
8.0 (*2) M3 M4 M5 M6 M8 M10
10.0 (*3) M3 M4 M5 M6 M8 M10
  • *1 Only available for A5052 Aluminum Alloy.
  • *2 Only available in PET (standard, transparent) OR Acrylic (standard, transparent)
  • *3 Only available in Acrylic (standard, transparent)

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