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 89
    $27.72
  • A55136 ACT 1/4-28 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal Uncoated 53
    $27.72
  • A55154 ACT 1/4-20 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN 24
    $39.87
  • A55155 ACT 1/4-28 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal ALTiN 12
    $39.87
  • A55173 ACT 1/4-20 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 42
    $29.78
  • A55174 ACT 1/4-28 0.255 2-1/2 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 11
    $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 41
    $30.47
  • A55138 ACT 5/16-24 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal Uncoated 58
    $22.68
  • A55156 ACT 5/16-18 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal ALTiN 7
    $43.62
  • A55157 ACT 5/16-24 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal ALTiN 4
    $38.89
  • A55175 ACT 5/16-18 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 67
    $32.78
  • A55176 ACT 5/16-24 0.318 2-23/32 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 83
    $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 100
    $36.00
  • A55140 ACT 3/8-24 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal Uncoated 56
    $36.00
  • A55159 ACT 3/8-24 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal ALTiN 9
    $38.76
  • A55177 ACT 3/8-16 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 15
    $38.68
  • A55178 ACT 3/8-24 0.381 2-15/16 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 72
    $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 24
    $45.73
  • A55142 ACT 7/16-20 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal Uncoated 23
    $34.27
  • A55161 ACT 7/16-20 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal ALTiN 3
    $41.03
  • A55179 ACT 7/16-14 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE 28
    $48.94
  • A55180 ACT 7/16-20 0.323 3-5/32 H3 4 Spiral Fluted Powdered Metal STEAM OXIDE 25
    $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
  • A78264 ACT 7/16-20 0.3230 3.1563 H5 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $46.74
  • 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
  • A78235 ACT 2-56 0.1410 1-3/4 H2 2 Spiral Fluted Powdered Metal ALTiN Available to Order*
    $36.81
  • A78245 ACT 2-56 0.1410 1-3/4 H2 2 Spiral Fluted Powdered Metal TiCN Available to Order*
    $29.31
  • A78286 ACT 2-56 0.1410 1-3/4 H2 2 Spiral Fluted Powdered Metal STEAM-OXIDE Available to Order*
    $27.50
  • A78341 ACT 2-56 0.1410 1-3/4 H2 2 Spiral Fluted Powdered Metal Uncoated Available to Order*
    $25.72
  • A55130 ACT 4-40 0.141 1-7/8 H2 2 Spiral Fluted Powdered Metal Uncoated 54
    $27.01
  • A55149 ACT 4-40 0.141 1-7/8 H2 2 Spiral Fluted Powdered Metal ALTiN 36
    $38.68
  • A55168 ACT 4-40 0.141 1-7/8 H2 2 Spiral Fluted Powdered Metal STEAM OXIDE 13
    $28.86
  • A78246 ACT 4-40 0.1410 1-7/8 H2 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $36.81
  • A55131 ACT 6-32 0.141 2 H3 2 Spiral Fluted Powdered Metal Uncoated 19
    $27.01
  • A55150 ACT 6-32 0.141 2 H3 2 Spiral Fluted Powdered Metal ALTiN 20
    $38.68
  • A55169 ACT 6-32 0.141 2 H3 2 Spiral Fluted Powdered Metal STEAM OXIDE Available to Order*
    $28.86
  • A78247 ACT 6-32 0.1410 2 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $36.81
  • A55132 ACT 8-32 0.168 2-1/8 H3 3 Spiral Fluted Powdered Metal Uncoated 73
    $27.01
  • A55151 ACT 8-32 0.168 2-1/8 H3 3 Spiral Fluted Powdered Metal ALTiN 19
    $38.68
  • A55170 ACT 8-32 0.168 2-1/8 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 48
    $28.86
  • A78248 ACT 8-32 0.1680 2-1/8 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $36.81
  • A55133 ACT 10-24 0.194 2-3/8 H3 3 Spiral Fluted Powdered Metal Uncoated 63
    $27.01
  • A55134 ACT 10-32 0.194 2-3/8 H3 3 Spiral Fluted Powdered Metal Uncoated 100
    $27.01
  • A55152 ACT 10-24 0.194 2-3/8 H3 3 Spiral Fluted Powdered Metal ALTiN 15
    $38.68
  • A55153 ACT 10-32 0.194 2-3/8 H3 3 Spiral Fluted Powdered Metal ALTiN 12
    $38.68
  • A55171 ACT 10-24 0.194 2-3/8 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 5
    $29.03
  • A55172 ACT 10-32 0.194 2-3/8 H3 3 Spiral Fluted Powdered Metal STEAM OXIDE 57
    $29.03
  • A78249 ACT 10-24 0.1940 2-3/8 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $30.31
  • A78250 ACT 10-32 0.1940 2-3/8 H3 3 Spiral Fluted Powdered Metal TiCN Available to Order*
    $36.81

* 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