Metric Flexible Hole Location Gages

Flexible hole location plug gages also referred to as centerline hole location plugs are used to determine the true centerline to centerline distances of threaded holes. The flexible hole location gage is slotted at 90° increments to ensure positive location on the thread flanks regardless of hole size. This feature provides a firm locating grip without pulling the shoulder of the plug up against the hole face thus avoiding any squareness error being transferred to the centerline measurement. The center is concentric to the threaded section within .0002" TIR for probe location of coordinate measuring machines as well as plate inspection setups as "overpin" measurements. The flexible hole location gage can also be used with vee blocks to check concentricity to other diameters. Thread Check stocks flexible hole location gages in unified and metric sizes. Gage sets are available. Thread Check’s expert sales engineers can assist you with selecting the correct gages for your application.

SKU Description Size Coarse Fine Each
FHL-M1.6x.35 M1.6 x .35 Flex Hole Location Gage M1.6 0.35 N/A
$141.00
FHL-M2x.4 M2 x .4 Flex Hole Location Gage M2 0.4 N/A
$136.00
FHL-M2.5x.45 M2.5 x .45 Flex Hole Location Gage M2.5 0.45 N/A
$136.00
FHL-M3x.5 M3 x .5 Flex Hole Location Gage M3 0.5 N/A
$131.00
FHL-M3.5x.6 M3.5 x .6 Flex Hole Location Gage M3.5 0.6 N/A
$131.00
FHL-M4x.7 M4 x .7 Flex Hole Location Gage M4 0.7 N/A
$129.00
FHL-M5x.8 M5 x .8 Flex Hole Location Gage M5 0.8 N/A
$129.00
FHL-M6x1.0 M6 x 1.0 Flex Hole Location Gage M6 1 N/A
$109.00
FHL-M8x1.0 M8 x 1.0 Flex Hole Location Gage M8 N/A 1
$109.00
FHL-M8x1.25 M8 x 1.25 Flex Hole Location Gage M8 1.25 N/A
$109.00
FHL-M10x1.5 M10 x 1.5 Flex Hole Location Gage M10 1.5 N/A
$112.00
FHL-M10x1.25 M10 x 1.25 Flex Hole Location Gage M10 1.25 N/A
$112.00
FHL-M10x.75 M10 x .75 Flex Hole Location Gage M10 0.75 N/A
$148.00
FHL-M12x1.75 M12 x 1.75 Flex Hole Location Gage M12 1.75 N/A
$119.00
FHL-M12x1.5 M12 x 1.5 Flex Hole Location Gage M12 1.5 N/A
$126.00
FHL-M12x1.25 M12 x 1.25 Flex Hole Location Gage M12 N/A 1.25
$126.00
FHL-M12x1.0 M12 x 1.0 Flex Hole Location Gage M12 N/A 1
$126.00
FHL-M14x2.0 M14 x 2.0 Flex Hole Location Gage M14 2 N/A
$130.00
FHL-M14x1.5 M14 x 1.5 Flex Hole Location Gage M14 N/A 1.5
$130.00
FHL-M15x1.0 M15 x 1.0 Flex Hole Location Gage M15 1 N/A
$130.00
FHL-M16x2.0 M16 x 2.0 Flex Hole Location Gage M16 2 N/A
$131.00
FHL-M16x1.5 M16 x 1.5 Flex Hole Location Gage M16 N/A 1.5
$131.00
FHL-M17x1.0 M17 x 1.0 Flex Hole Location Gage M17 1 N/A
$137.00
FHL-M18x1.5 M18 x 1.5 Flex Hole Location Gage M18 N/A 1.5
$137.00
FHL-M20x1.5 M20 x 1.5 Flex Hole Location Gage M20 N/A 1.5
$136.00
FHL-M20x1.0 M20 x 1.0 Flex Hole Location Gage M20 1 N/A
$140.00
FHL-M22x1.5 M22 x 1.5 Flex Hole Location Gage M22 N/A 1.5
$153.00
FHL-M24x3.0 M24 x 3.0 Flex Hole Location Gage M24 3 N/A
$166.00
FHL-M24x2.0 M24 x 2.0 Flex Hole Location Gage M24 N/A 2
$166.00
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Additional Info

  • Positive grip on flanks regardless of hole size
  • Center is concentric with threaded section within .0002" T.I.R. for probe location of coordinate measuring machines
  • The .2500 +/- .0001(6.35mm +/- .0025mm) shank is concentric to the threaded section within .0002 T.I.R. prior to slotting and may be used with micrometers or plate inspection setups as "overpin" measurement.
  • Used with vee-block, concentricity checks can be made with other diameters.
  • Sizes #10 (M5 Metric) and smaller are solid tapered thread form from low limit to high limit of class 2B pitch diameters.
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