Spiral Fluted Semi-Bottoming - ANSI Threads

Spiral Fluted Semi-Bottoming - ANSI Threads

Atlas High Performance Spiral Fluted Semi-Bottoming - ANSI Thread Taps

Spiral Flute Semi Bottoming - ANSI Threads - High Vanadium Powdered Metal

  • Best used for blind hole tapping applications
  •  Optimized for steel, steel alloys, stainless steels, and a variety of other steels up to 32 Rc
  • Steam Oxide finish provides decreased galling and increased lubricity in low carbon steels and gummy materials  
  • Features a 2 -2 1/2 thread chamfer
  • Semi-bottoming 45° helix
  • ALTIN is a high performance coating for milling, tapping and drilling in stainless steels, carbon steels, alloy steels, titanium and cast iron. This coating is extremely heat resistant and can be used with or without coolant. 

Speeds and Feed Info

Have a question or need help?

Call Customer Service at 908-98-ATLAS or email: Sales@atlascuttingtools.com
  • 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
    A55135 ACT 1/4-20 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal Uncoated 16
    $27.72
  • A55136 ACT 1/4-28 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal Uncoated 83
    $27.72
  • A55154 ACT 1/4-20 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN 23
    $39.87
  • A55155 ACT 1/4-28 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN 11
    $39.87
  • A55173 ACT 1/4-20 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 58
    $29.78
  • A55174 ACT 1/4-28 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 63
    $29.78
  • A78236 ACT 1/4-20 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $37.97
  • A78237 ACT 1/4-28 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $37.97
  • A78251 ACT 1/4-20 0.2550 2-1/2 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $37.97
  • A78252 ACT 1/4-28 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $37.97
  • A78253 ACT 1/4-28 0.2550 2-1/2 H4 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $30.63
  • A78287 ACT 1/4-20 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $28.37
  • A78288 ACT 1/4-28 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $28.37
  • A78342 ACT 1/4-20 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $26.39
  • A78343 ACT 1/4-28 0.2550 2-1/2 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $26.39
  • A55137 ACT 5/16-18 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal Uncoated 67
    $30.47
  • A55138 ACT 5/16-24 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal Uncoated 43
    $22.68
  • A55156 ACT 5/16-18 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal ALTiN 16
    $43.62
  • A55157 ACT 5/16-24 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal ALTiN 10
    $38.89
  • A55175 ACT 5/16-18 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 58
    $32.78
  • A55176 ACT 5/16-24 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 80
    $32.62
  • A78224 ACT 5/16-24 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $21.59
  • A78238 ACT 5/16-18 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $41.56
  • A78239 ACT 5/16-24 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $41.52
  • A78254 ACT 5/16-18 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $41.56
  • A78255 ACT 5/16-18 0.3180 2.7188 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $41.56
  • A78256 ACT 5/16-24 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $41.56
  • A78257 ACT 5/16-24 0.3180 2.7188 H4 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $31.07
  • A78289 ACT 5/16-18 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $31.22
  • A78290 ACT 5/16-24 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $31.04
  • A78344 ACT 5/16-18 0.3180 2.7188 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $29.02
  • A55139 ACT 3/8-16 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $36.00
  • A55140 ACT 3/8-24 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal Uncoated 44
    $36.00
  • A55158 ACT 3/8-16 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $51.75
  • A55159 ACT 3/8-24 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $38.76
  • A55177 ACT 3/8-16 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 35
    $38.68
  • 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*
    $34.26
  • A78226 ACT 3/8-24 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $25.62
  • A78240 ACT 3/8-24 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $49.22
  • A78258 ACT 3/8-16 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $49.28
  • A78259 ACT 3/8-16 0.3810 2-15/16 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $49.28
  • A78260 ACT 3/8-24 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $41.80
  • A78261 ACT 3/8-24 0.3810 2-15/16 H4 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $36.92
  • A78291 ACT 3/8-16 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $36.81
  • A78292 ACT 3/8-24 0.3810 2-15/16 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $36.77
  • A55141 ACT 7/16-14 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal Uncoated 37
    $45.73
  • A55142 ACT 7/16-20 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal Uncoated 22
    $34.27
  • A55160 ACT 7/16-14 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal ALTiN 4
    $54.84
  • A55161 ACT 7/16-20 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal ALTiN 1
    $41.03
  • A55179 ACT 7/16-14 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE 64
    $48.94
  • A55180 ACT 7/16-20 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE 23
    $48.86
  • A78227 ACT 7/16-14 0.3230 3.1563 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $32.62
  • A78228 ACT 7/16-20 0.3230 3.1563 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $43.54
  • A78262 ACT 7/16-14 0.3230 3.1563 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $50.51
  • A78263 ACT 7/16-20 0.3230 3.1563 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $62.30
  • A78264 ACT 7/16-20 0.3230 3.1563 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $46.74
  • A78279 ACT 7/16-14 0.3230 3.1563 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $62.30
  • A78280 ACT 7/16-20 0.3230 3.1563 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $52.24
  • A78293 ACT 7/16-14 0.3230 3.1563 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $46.55
  • A78294 ACT 7/16-20 0.3230 3.1563 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $46.39
  • A55143 ACT 1/2-13 0.367 3-3/8 H3 4 Spiral Fluted Powdered Metal Uncoated 39
    $53.89
  • A55144 ACT 1/2-20 0.367 3-3/8 H3 4 Spiral Fluted Powdered Metal Uncoated 47
    $53.89
  • A55162 ACT 1/2-13 0.367 3-3/8 H3 4 Spiral Fluted Powdered Metal ALTiN 13
    $77.65
  • A55163 ACT 1/2-20 0.367 3-3/8 H3 4 Spiral Fluted Powdered Metal ALTiN 15
    $77.65
  • A55181 ACT 1/2-13 0.367 3-3/8 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE 15
    $58.01
  • A55182 ACT 1/2-20 0.367 3-3/8 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE 18
    $58.01
  • A78229 ACT 1/2-13 0.3670 3-3/8 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $51.32
  • A78230 ACT 1/2-20 0.3670 3-3/8 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $51.32
  • A78265 ACT 1/2-13 0.3670 3-3/8 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $73.92
  • A78266 ACT 1/2-13 0.3670 3-3/8 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $73.92
  • A78267 ACT 1/2-20 0.3670 3-3/8 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $73.92
  • A78268 ACT 1/2-20 0.3670 3-3/8 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $55.39
  • A78281 ACT 1/2-13 0.3670 3-3/8 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $73.92
  • A78282 ACT 1/2-20 0.3670 3-3/8 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $60.12
  • A78295 ACT 1/2-13 0.3670 3-3/8 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $55.25
  • A78296 ACT 1/2-20 0.3670 3-3/8 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $54.26
  • A55145 ACT 5/8-11 0.48 3-13/16 H3 4 Spiral Fluted Powdered Metal Uncoated 20
    $77.23
  • A55146 ACT 5/8-18 0.48 3-13/16 H3 4 Spiral Fluted Powdered Metal Uncoated 55
    $77.23
  • A55164 ACT 5/8-11 0.48 3-13/16 H3 4 Spiral Fluted Powdered Metal ALTiN 5
    $115.50
  • A55165 ACT 5/8-18 0.48 3-13/16 H3 4 Spiral Fluted Powdered Metal ALTiN 23
    $115.50
  • A55183 ACT 5/8-11 0.48 3-13/16 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE 19
    $110.83
  • A55184 ACT 5/8-18 0.48 3-13/16 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE Available to Order*
    $83.09
  • A78231 ACT 5/8-11 0.4800 3-13/16 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $98.62
  • A78232 ACT 5/8-18 0.4800 3-13/16 H3 3 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $73.95
  • A78241 ACT 5/8-11 0.4800 3-13/16 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $102.13
  • A78242 ACT 5/8-18 0.4800 3-13/16 H3 3 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $76.58
  • A78269 ACT 5/8-11 0.4800 3-13/16 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $141.13
  • A78270 ACT 5/8-18 0.4800 3-13/16 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $107.98
  • A78283 ACT 5/8-11 0.4800 3-13/16 H3 3 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $141.17
  • A55147 ACT 3/4-10 0.59 4-1/4 H3 4 Spiral Fluted Powdered Metal Uncoated 87
    $121.10
  • A55148 ACT 3/4-16 0.59 4-1/4 H3 4 Spiral Fluted Powdered Metal Uncoated 29
    $90.21
  • A55167 ACT 3/4-16 0.59 4-1/4 H3 4 Spiral Fluted Powdered Metal ALTiN 3
    $135.94
  • A55185 ACT 3/4-10 0.59 4-1/4 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE 19
    $129.56
  • A55186 ACT 3/4-16 0.59 4-1/4 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE 16
    $129.56
  • A78233 ACT 3/4-10 0.5900 4-1/4 H3 4 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $85.90
  • A78234 ACT 3/4-16 0.5900 4-1/4 H3 4 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $85.90
  • A78243 ACT 3/4-10 0.5900 4-1/4 H3 4 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $123.36
  • A78244 ACT 3/4-16 0.5900 4-1/4 H3 4 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $89.70
  • A78271 ACT 3/4-10 0.5900 4-1/4 H3 4 Spiral Fluted Powdered Metal TiCN Available to Order*
    $126.46

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

  • Total: items /

Adding your products to cart

View Cart Continue Shopping