Spiral Flute CNC Style

Spiral Flute CNC Style

Spiral Fluted Semi-Bottoming - ANSI Threads
Spiral Fluted Semi-Bottoming - ANSI Threads
Spiral Fluted Semi-Bottoming - Metric Threads
Spiral Fluted Semi-Bottoming - Metric Threads

Spiral fluted semi-bottoming taps are cutting tools designed for creating threads in holes that are not blind. These taps are equipped with a unique spiral fluted design that provides several advantages over traditional straight fluted taps. The spiral fluted design allows for the efficient evacuation of chips, reduces heat buildup, and provides a smoother and more accurate tapping operation.

One of the key benefits of spiral fluted semi-bottoming taps is their ability to prevent the tap from bottoming out in the hole, which can cause damage to both the tap and the workpiece. These taps have a shortened thread length, which allows for the creation of threads close to the bottom of the hole, without the risk of the tap going too far. This makes them ideal for applications where a partial thread is required, or where a through-hole must be tapped to a specific depth.

  • Compare SKU Vendor Size Shank Diameter Overall Length H Limit D Limit NC / NF Square Size Square Length Thread Length Number of Lube Grooves Number of Flutes Style Material Coating In Stock Price Quantity
    A55232 ACT M3 X 0.5 0.141 1-15/16 D3 2 Spiral Fluted Powdered Metal Uncoated 100
    $30.68
  • A55135 ACT 1/4-20 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal Uncoated 16
    $27.71
  • A55239 ACT M3 X 0.5 0.141 1-15/16 D3 2 Spiral Fluted Powdered Metal STEAM OXIDE 50
    $32.82
  • A55136 ACT 1/4-28 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal Uncoated 83
    $27.71
  • A55246 ACT M3 X 0.5 0.141 1-15/16 D3 2 Spiral Fluted Powdered Metal ALTiN 22
    $42.10
  • A55154 ACT 1/4-20 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN 23
    $39.87
  • A78305 ACT M3 X 0.5 0.1410 1-15/16 D3 2 Spiral Fluted Powdered Metal TiCN Available to Order*
    $40.68
  • A55155 ACT 1/4-28 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN 11
    $39.87
  • A78362 ACT M3.5 x 0.6 0.1410 2 D3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $29.51
  • A55173 ACT 1/4-20 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 58
    $29.77
  • A78371 ACT M3.5 x 0.6 0.1410 2 D3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $22.57
  • A55174 ACT 1/4-28 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 63
    $29.77
  • A78236 ACT 1/4-20 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $38.54
  • A55233 ACT M4 X 0.7 0.168 2-1/8 D4 3 Spiral Fluted Powdered Metal Uncoated 100
    $30.68
  • A78237 ACT 1/4-28 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $38.54
  • A55240 ACT M4 X 0.7 0.168 2-1/8 D4 3 Spiral Fluted Powdered Metal STEAM OXIDE 36
    $32.82
  • A78251 ACT 1/4-20 0.2550 2-1/2 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $38.54
  • A55247 ACT M4 X 0.7 0.168 2-1/8 D4 3 Spiral Fluted Powdered Metal ALTiN 14
    $42.10
  • A78297 ACT M4 X 0.7 0.1680 2-1/8 D3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $40.68
  • A78252 ACT 1/4-28 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $38.54
  • A78306 ACT M4 X 0.7 0.1680 2-1/8 D4 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $40.68
  • A78253 ACT 1/4-28 0.2550 2-1/2 H4 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $31.09
  • A78310 ACT M4 X 0.7 0.1680 2-1/8 D3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $40.68
  • A78287 ACT 1/4-20 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $28.80
  • A78363 ACT M4 X 0.7 0.1680 2-1/8 D3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $29.67
  • A78288 ACT 1/4-28 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $28.80
  • A78372 ACT M4 X 0.7 0.1680 2-1/8 D3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $31.73
  • A78342 ACT 1/4-20 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $26.78
  • A78343 ACT 1/4-28 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $26.78
  • A55234 ACT M5 X 0.8 0.194 2-3/8 D4 3 Spiral Fluted Powdered Metal Uncoated 100
    $30.68
  • A55241 ACT M5 X 0.8 0.194 2-3/8 D4 3 Spiral Fluted Powdered Metal STEAM OXIDE 42
    $32.82
  • A55137 ACT 5/16-18 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal Uncoated 67
    $30.47
  • A55248 ACT M5 X 0.8 0.194 2-3/8 D4 3 Spiral Fluted Powdered Metal ALTiN 18
    $42.10
  • A55138 ACT 5/16-24 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal Uncoated 43
    $22.68
  • A78298 ACT M5 X 0.8 0.1940 2-3/8 D3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $40.68
  • A55156 ACT 5/16-18 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal ALTiN 16
    $43.63
  • A78307 ACT M5 X 0.8 0.1940 2-3/8 D4 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $34.28
  • A55157 ACT 5/16-24 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal ALTiN 10
    $38.88
  • A78311 ACT M5 X 0.8 0.1940 2-3/8 D3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $40.68
  • A55175 ACT 5/16-18 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 58
    $32.78
  • A78364 ACT M5 X 0.8 0.1940 2-3/8 D3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $29.67
  • A55176 ACT 5/16-24 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 80
    $32.62
  • A78373 ACT M5 X 0.8 0.1940 2-3/8 D3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $31.73
  • A78224 ACT 5/16-24 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $21.91
  • A78238 ACT 5/16-18 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $42.19
  • A55235 ACT M6 X 1.0 0.255 2-1/2 D5 3 Spiral Fluted Powdered Metal Uncoated 100
    $31.42
  • A78239 ACT 5/16-24 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $42.15
  • A55242 ACT M6 X 1.0 0.255 2-1/2 D5 3 Spiral Fluted Powdered Metal STEAM OXIDE 17
    $33.81
  • A78254 ACT 5/16-18 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $42.19
  • A55249 ACT M6 X 1.0 0.255 2-1/2 D5 3 Spiral Fluted Powdered Metal ALTiN 8
    $43.63
  • A78299 ACT M6 X 1.0 0.2550 2-1/2 D3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $42.19
  • A78255 ACT 5/16-18 0.3180 2.7188 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $42.19
  • A78308 ACT M6 X 1.0 0.2550 2-1/2 D5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $42.19
  • A78256 ACT 5/16-24 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $42.19
  • A78312 ACT M6 X 1.0 0.2550 2-1/2 D3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $42.19
  • A78257 ACT 5/16-24 0.3180 2.7188 H4 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $31.54
  • A78365 ACT M6 X 1.0 0.2550 2-1/2 D3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $30.39
  • A78289 ACT 5/16-18 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $31.68
  • A78374 ACT M6 X 1.0 0.2550 2-1/2 D3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $32.68
  • A78290 ACT 5/16-24 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $31.51
  • A78344 ACT 5/16-18 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $29.46
  • A55236 ACT M8 X 1.25 0.318 2-23/32 D5 3 Spiral Fluted Powdered Metal Uncoated 64
    $34.68
  • A55243 ACT M8 X 1.25 0.318 2-23/32 D5 3 Spiral Fluted Powdered Metal STEAM OXIDE 21
    $37.15
  • A55139 ACT 3/8-16 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $36.00
  • A55250 ACT M8 X 1.25 0.318 2-23/32 D5 3 Spiral Fluted Powdered Metal ALTiN 19
    $48.33
  • A55140 ACT 3/8-24 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal Uncoated 44
    $36.00
  • A78300 ACT M8 X 1.25 0.3180 2.7188 D3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $46.71
  • A55158 ACT 3/8-16 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $51.75
  • A78313 ACT M8 X 1.25 0.3180 2.7188 D3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $46.71
  • A55159 ACT 3/8-24 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $38.76
  • A78366 ACT M8 X 1.25 0.3180 2.7188 D3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $33.52
  • A55177 ACT 3/8-16 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 35
    $38.68
  • A78375 ACT M8 X 1.25 0.3180 2.7188 D3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $35.91
  • A55178 ACT 3/8-24 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 64
    $38.60
  • A78225 ACT 3/8-16 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $34.78
  • A55237 ACT M10 X 1.5 0.381 2-15/16 D6 3 Spiral Fluted Powdered Metal Uncoated 100
    $40.82
  • A78226 ACT 3/8-24 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $26.00
  • A55244 ACT M10 X 1.5 0.381 2-15/16 D6 3 Spiral Fluted Powdered Metal STEAM OXIDE 26
    $43.91
  • A78240 ACT 3/8-24 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $49.96
  • A55251 ACT M10 X 1.5 0.381 2-15/16 D6 3 Spiral Fluted Powdered Metal ALTiN 16
    $50.72
  • A78301 ACT M10 X 1.5 0.3810 2-15/16 D3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $55.04
  • A78258 ACT 3/8-16 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $50.02
  • A78309 ACT M10 X 1.5 0.3670 2-15/16 D6 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $55.04
  • A78259 ACT 3/8-16 0.3810 2-15/16 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $50.02
  • A78314 ACT M10 X 1.5 0.3810 2-15/16 D3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $55.04
  • A78260 ACT 3/8-24 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $42.43
  • A78367 ACT M10 X 1.5 0.3810 2-15/16 D3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $39.46
  • A78261 ACT 3/8-24 0.3810 2-15/16 H4 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $37.48
  • A78376 ACT M10 X 1.5 0.3810 2-15/16 D3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $42.43
  • A78291 ACT 3/8-16 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $37.37
  • A78292 ACT 3/8-24 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $37.33
  • A55238 ACT M12 X 1.75 0.367 3-3/8 D6 3 Spiral Fluted Powdered Metal Uncoated 34
    $61.23
  • A55245 ACT M12 X 1.75 0.367 3-3/8 D6 3 Spiral Fluted Powdered Metal STEAM OXIDE 18
    $48.12
  • A55141 ACT 7/16-14 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal Uncoated 37
    $45.73
  • A55252 ACT M12 X 1.75 0.367 3-3/8 D6 3 Spiral Fluted Powdered Metal ALTiN 11
    $85.72
  • A55142 ACT 7/16-20 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal Uncoated 22
    $34.27
  • A78302 ACT M12 X 1.75 0.3670 3-3/8 D3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $68.01
  • A55160 ACT 7/16-14 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal ALTiN 4
    $54.84
  • A78315 ACT M12 X 1.75 0.3670 3-3/8 D3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $82.86
  • A55161 ACT 7/16-20 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal ALTiN 1
    $41.03

* Lead times can vary from 1–10 business days. Call (908) 98-ATLAS or email sales@atlascuttingtools.com for details.

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