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ANBWCOS-SFT-MHSS-E Oversize Spiral Flute Tap Metric OS-SFT-MSold0pcsThe OS-SFT-M is an oversize tap made of cobalt high-speed steel (HSS-E) — oversized thread to allow for plating thickness or to compensate for material shrinkage after tapping. It comes in 44 sizes (thread dia 2~16, pitch 0.4~2). Supplied uncoated (bright finish). It handles carbon and alloy steel, stainless steel, cast iron, non-ferrous metals such as aluminium and copper, with workpiece hardness up to HRC40. Typical applications: blind-hole tapping before plating or zinc coating; the thread is cut slightly oversize to allow for the coating thickness, so the screw still fits after finishing. This is the spiral flute version, lifting chips toward the shank. In the same H.T.D family: the oversize spiral point OS-POT-M (for through holes, the same 44 sizes as this series), the Whitworth OS-SFT-W and the American OS-SFT; OS-SFT-M covers thread dia 2~16 with four oversize grades: 0.03, 0.05, 0.07 and 0.1mm. How do I choose the oversize? By coating thickness: the thicker the coating, the larger the oversize. M6x1 comes in all four grades, 0.03, 0.05, 0.07 and 0.1mm; M2 and M2.6 come in 0.03 and 0.05 only. Can it be used for through holes? Yes, but for high-volume through-hole work use the oversize spiral point OS-POT-M.
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Cutting ToolsTapOversize Tap
HSS-E Oversize Spiral Flute Tap Metric OS-SFT-M
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HSS-E Oversize Spiral Flute Tap Metric OS-SFT-M

The OS-SFT-M is an oversize tap made of cobalt high-speed steel (HSS-E) — oversized thread to allow for plating thickness or to compensate for material shrinkage after tapping. It comes in 44 sizes (thread dia 2~16, pitch 0.4~2).

Specifications (44 items)

Dia.
2~4
Expand this group (16 specs)
Part No.StandardDia.PitchOversize
ANBWCOS-SFT_2x0.4+3Metric M20.40.03
ANBWCOS-SFT_2x0.4+5Metric M20.40.05
ANBWCOS-SFT_2.5x0.45+3Metric M2.50.450.03
ANBWCOS-SFT_2.5x0.45+5Metric M2.50.450.05
ANBWCOS-SFT_2.5x0.45+7Metric M2.50.450.07
ANBWCOS-SFT_2.5x0.45+10Metric M2.50.450.1
ANBWCOS-SFT_2.6x0.45+3Metric M2.60.450.03
ANBWCOS-SFT_2.6x0.45+5Metric M2.60.450.05
ANBWCOS-SFT_3x0.5+3Metric M30.50.03
ANBWCOS-SFT_3x0.5+5Metric M30.50.05
ANBWCOS-SFT_3x0.5+7Metric M30.50.07
ANBWCOS-SFT_3x0.5+10Metric M30.50.1
ANBWCOS-SFT_4x0.7+3Metric M40.70.03
ANBWCOS-SFT_4x0.7+5Metric M40.70.05
ANBWCOS-SFT_4x0.7+7Metric M40.70.07
ANBWCOS-SFT_4x0.7+10Metric M40.70.1
5~8
Expand this group (12 specs)
Part No.StandardDia.PitchOversize
ANBWCOS-SFT_5x0.8+3Metric M50.80.03
ANBWCOS-SFT_5x0.8+5Metric M50.80.05
ANBWCOS-SFT_5x0.8+7Metric M50.80.07
ANBWCOS-SFT_5x0.8+10Metric M50.80.1
ANBWCOS-SFT_6x1+3Metric M610.03
ANBWCOS-SFT_6x1+5Metric M610.05
ANBWCOS-SFT_6x1+7Metric M610.07
ANBWCOS-SFT_6x1+10Metric M610.1
ANBWCOS-SFT_8x1.25+3Metric M81.250.03
ANBWCOS-SFT_8x1.25+5Metric M81.250.05
ANBWCOS-SFT_8x1.25+7Metric M81.250.07
ANBWCOS-SFT_8x1.25+10Metric M81.250.1
10~14
Expand this group (12 specs)
Part No.StandardDia.PitchOversize
ANBWCOS-SFT_10x1.5+3Metric M101.50.03
ANBWCOS-SFT_10x1.5+5Metric M101.50.05
ANBWCOS-SFT_10x1.5+7Metric M101.50.07
ANBWCOS-SFT_10x1.5+10Metric M101.50.1
ANBWCOS-SFT_12x1.75+3Metric M121.750.03
ANBWCOS-SFT_12x1.75+5Metric M121.750.05
ANBWCOS-SFT_12x1.75+7Metric M121.750.07
ANBWCOS-SFT_12x1.75+10Metric M121.750.1
ANBWCOS-SFT_14x2+3Metric M1420.03
ANBWCOS-SFT_14x2+5Metric M1420.05
ANBWCOS-SFT_14x2+7Metric M1420.07
ANBWCOS-SFT_14x2+10Metric M1420.1
16
Expand this group (4 specs)
Part No.StandardDia.PitchOversize
ANBWCOS-SFT_16x2+3Metric M1620.03
ANBWCOS-SFT_16x2+5Metric M1620.05
ANBWCOS-SFT_16x2+7Metric M1620.07
ANBWCOS-SFT_16x2+10Metric M1620.1

Specification Range

Diameter2~16
Pitch0.4~2

Product Description

The OS-SFT-M is an oversize tap made of cobalt high-speed steel (HSS-E) — oversized thread to allow for plating thickness or to compensate for material shrinkage after tapping. It comes in 44 sizes (thread dia 2~16, pitch 0.4~2). Supplied uncoated (bright finish). It handles carbon and alloy steel, stainless steel, cast iron, non-ferrous metals such as aluminium and copper, with workpiece hardness up to HRC40. Typical applications: blind-hole tapping before plating or zinc coating; the thread is cut slightly oversize to allow for the coating thickness, so the screw still fits after finishing. This is the spiral flute version, lifting chips toward the shank. In the same H.T.D family: the oversize spiral point OS-POT-M (for through holes, the same 44 sizes as this series), the Whitworth OS-SFT-W and the American OS-SFT; OS-SFT-M covers thread dia 2~16 with four oversize grades: 0.03, 0.05, 0.07 and 0.1mm. How do I choose the oversize? By coating thickness: the thicker the coating, the larger the oversize. M6x1 comes in all four grades, 0.03, 0.05, 0.07 and 0.1mm; M2 and M2.6 come in 0.03 and 0.05 only. Can it be used for through holes? Yes, but for high-volume through-hole work use the oversize spiral point OS-POT-M.

Workpiece Materials & Hardness

  • Steel (P)
  • Stainless steel (M)
  • Cast iron (K)
  • Non-ferrous metals (N)

Max. workpiece hardness HRC40

Related Resources

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