(TC174) HSS-E (M35) UNC Spiral Flute for Steel

Bright UNC spiral flute taps for blind holes

(TC174) HSS-E (M35) UNC Spiral Flute for Steel
$21.78 INC GST $19.80 EX GST
SKU
TC174322
Work materials
PMS

Key features

  • Bright-finish HSS-E M35 UNC spiral flute machine taps
  • Special flute geometry for blind-hole chip evacuation
  • Unified Coarse thread sizes from #6-32 UNC to 3/4-10 UNC
Tool material HSS-E
Surface treatment Bright
Size
TPI
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Blind-hole chip control

Special flute geometry supports excellent chip evacuation when tapping blind holes.

Useful UNC coverage

Sizes run from #6-32 UNC to 3/4-10 UNC for coarse Unified threads.

Standardised dimensions

DIN 371 and DIN 376 dimensions support appropriate tap selection across the series.

SKUSizeTPIThread length (mm)Overall length (mm)Neck length (mm)Shank dia. (mm)Square size (mm)Square length (mm)FlutesTapping drill dia. (mm)CAD filesStock Price Qty Add
TC174322#1024UNC10.070.025.06.04.98.033.9STEPDXF 1-2 Weeks $19.80
TC174242#632UNC7.056.020.04.03.06.032.85STEPDXF 1-2 Weeks $19.80
TC1744021/420UNC13.080.030.07.05.58.035.2STEPDXF 1-2 Weeks $19.80
TC1744425/1618UNC14.090.035.08.06.29.036.6STEPDXF In stock $23.60
TC1744823/816UNC16.0100.039.09.07.010.038.0STEPDXF 1-2 Weeks $28.40
TC1745621/213UNC20.0110.044.09.07.010.0310.75STEPDXF In stock $36.90
TC1746029/1612UNC20.0110.044.011.09.012.0312.25STEPDXF Low stock $60.00
TC1746425/811UNC22.0110.044.012.09.012.0313.5STEPDXF In stock $68.00
TC1747023/410UNC25.0125.050.014.011.014.0416.5STEPDXF In stock $99.50

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Product Description

YG-1 TC174 HSS-E (M35) UNC spiral flute machine taps are bright-finish tools designed for blind-hole steel threading. The special flute geometry promotes excellent chip evacuation, directing chips effectively from the cutting area in blind holes. These machine taps produce Unified Coarse UNC threads for steel applications. Three flutes provide the listed cutting configuration throughout the TC174 series. Available sizes cover #6-32 UNC through 3/4-10 UNC, covering commonly specified coarse thread sizes. Smaller sizes follow DIN 371, while larger sizes use DIN 376 dimensions. The range includes tapping-drill diameters from 2.85 mm to 16.5 mm. Select the matching SKU and tapping-drill diameter for the required thread size.

  • Bright-finish HSS-E M35 UNC spiral flute machine taps
  • Special flute geometry for blind-hole chip evacuation
  • Unified Coarse thread sizes from #6-32 UNC to 3/4-10 UNC
  • Three-flute cutting configuration
  • DIN 371 and DIN 376 dimensional standards
  • Tapping-drill diameters from 2.85 mm to 16.5 mm
Product Data
Chamfer Lead Form C
Hole Type Blind
Spiral Flute Angle 40°
Standard DIN 371 / 376
Surface Treatment Bright
Thread Angle 60°
Thread Class 2B
Thread Shape UNC
Tool Material HSS-E
EDP No. Size TPI Thread Length Overall Length Neck Length Shank Diameter Square Size Square Length No. of Flute TC174162 #4 40 6 56 18 3.5 2.7 6 3 TC174202 #5 40 7 56 18 3.55 2.7 6 3 TC174242 #6 32 7 56 20 4 3 6 3 TC174282 #8 32 8 63 21 4.5 3.4 6 3 TC174322 #10 24 10 70 25 6 4.9 8 3 TC174362 #12 24 10 80 30 6 4.9 8 3 TC174402 1/4 20 13 80 30 7 5.5 8 3 TC174442 5/16 18 14 90 35 8 6.2 9 3 TC174482 3/8 16 16 100 39 9 7 10 3 TC174522 7/16 14 17 100 40 8 6.2 9 3 TC174562 1/2 13 20 110 44 9 7 10 3 TC174602 9/16 12 20 110 44 11 9 12 3 TC174642 5/8 11 22 110 44 12 9 12 3 TC174702 3/4 10 25 125 50 14 11 14 4 TC174742 7/8 9 27 140 54 18 14.5 17 4 TC174782 1" 8 30 160 60 20 16 19 4 TC174822 1-1/8 7 35 180 65 22 18 21 4

Work materials

VDI 3323 recommendations for this tool.

ExcellentGood

Steel

9 grades
Non-alloy steel
ExcellentVDI 5
GoodVDI 2–4
Low-alloy steel
ExcellentVDI 8–9
GoodVDI 6–7
High-alloy and tool steel
GoodVDI 10

Superalloys & titanium

2 grades
Heat-resistant superalloys
GoodVDI 31
Titanium alloys
GoodVDI 36

Stainless steel

1 grade
Stainless steel
GoodVDI 14
VDI grade reference12 grades

Individual grade ratings and nominal hardness references. Base grades and decimal subgrades are listed separately.

Recommended VDI grades and nominal hardness references
VDIWork materialRecommendationHB ref.HRC ref.
2PNon-alloy steelGood19013
3PNon-alloy steelGood25025
4PNon-alloy steelGood27028
5PNon-alloy steelExcellent30032
6PLow-alloy steelGood18010
7PLow-alloy steelGood27529
8PLow-alloy steelExcellent30032
9PLow-alloy steelExcellent35038
10PHigh-alloy and tool steelGood20015
14MStainless steelGood18010
31SHeat-resistant superalloysGood20015
36STitanium alloysGood--

HB and HRC values are nominal catalogue references. Grade subdivisions can vary between catalogues.

Recommendations apply to the listed VDI grades. Unlisted grades have no stated recommendation.

EDP No. Size TPI Thread Length Overall Length Neck Length Shank Diameter Square Size Square Length No. of Flute TC174162 #4 40 6 56 18 3.5 2.7 6 3 TC174202 #5 40 7 56 18 3.55 2.7 6 3 TC174242 #6 32 7 56 20 4 3 6 3 TC174282 #8 32 8 63 21 4.5 3.4 6 3 TC174322 #10 24 10 70 25 6 4.9 8 3 TC174362 #12 24 10 80 30 6 4.9 8 3 TC174402 1/4 20 13 80 30 7 5.5 8 3 TC174442 5/16 18 14 90 35 8 6.2 9 3 TC174482 3/8 16 16 100 39 9 7 10 3 TC174522 7/16 14 17 100 40 8 6.2 9 3 TC174562 1/2 13 20 110 44 9 7 10 3 TC174602 9/16 12 20 110 44 11 9 12 3 TC174642 5/8 11 22 110 44 12 9 12 3 TC174702 3/4 10 25 125 50 14 11 14 4 TC174742 7/8 9 27 140 54 18 14.5 17 4 TC174782 1" 8 30 160 60 20 16 19 4 TC174822 1-1/8 7 35 180 65 22 18 21 4

YG Tap Steel

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