A Harvey Performance Company

Thread Milling Cutters - Tri-Form - UN Threads

Holemaking & Threading
Holemaking & Threading

Thread Milling Cutters - Tri-Form - UN Threads are designed for threading in hardened steels and difficult-to-machine materials. Its left hand cut, left hand spiral design is ideal for climb milling from the top of a thread to the bottom of right hand threads.

  • Designed for threading in hardened steels and difficult-to-machine materials
  • Left-hand-cut, left-hand spiral design for climb milling from top to bottom of right-hand threads
  • Three forms and helical design reduces tool pressure and deflection resulting in accurate threads
  • Cuts internal 60° UN threads
  • Able to cut larger threads of the same pitch
  • h6 shank tolerance for high precision tool holders
  • Latest generation AlTiN Nano coating offers superior hardness and heat resistance
  • Select carbide grade for maximum tool life
  • CNC ground in the USA   

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THREAD
SIZE
CUTTER
DIA.
LENGTH OF CUT NECK
DIA.
MAX DEPTH
OF THREAD
FLUTES SHANK
DIA.
OAL AlTiN NANO COATED Add to Cart Default Sort
  D1
+.0005"-.0005"
L2    L3
+.020"-.000"
# D2(h6) L1 3 FL PRICE
2-56 .065 .053 .042 3/32 3 1/4 2-1/2 899910-C6 $166.20 00000001
2-56 .065 .053 .042 5/32 3 1/4 2-1/2 896410-C6 $173.10 00000002
4-40 .085 .075 .053 3/32 3 1/4 2-1/2 899916-C6 $166.20 00000003
4-40 .085 .075 .053 5/32 3 1/4 2-1/2 896416-C6 $173.10 00000004
6-32 .100 .093 .061 5/32 3 1/4 2-1/2 899922-C6 $166.20 00000005
6-32 .100 .093 .061 1/4 3 1/4 2-1/2 896422-C6 $173.10 00000006
8-32 .126 .093 .087 7/32 3 1/4 2-1/2 899928-C6 $154.40 00000007
8-32 .126 .093 .087 5/16 3 1/4 2-1/2 896428-C6 $161.40 00000008
10-24 .138 .125 .086 7/32 3 1/4 2-1/2 899934-C6 $154.40 00000009
10-24 .138 .125 .086 5/16 3 1/4 2-1/2 896434-C6 $161.40 00000010
10-32 .145 .093 .106 7/32 3 1/4 2-1/2 899936-C6 $154.40 00000011
10-32 .145 .093 .106 5/16 3 1/4 2-1/2 896436-C6 $161.40 00000012
1/4-20 .187 .150 .124 5/16 3 1/4 2-1/2 899944-C6 $154.40 00000013
1/4-20 .187 .150 .124 1/2 3 1/4 2-1/2 896444-C6 $161.40 00000014
1/4-28 .197 .107 .151 5/16 3 1/4 2-1/2 899946-C6 $154.40 00000015
1/4-28 .197 .107 .151 1/2 3 1/4 2-1/2 896446-C6 $161.40 00000016
5/16-18 .236 .166 .166 3/8 3 1/4 2-1/2 899954-C6 $154.40 00000017
5/16-18 .236 .166 .166 1/2 3 1/4 2-1/2 896454-C6 $161.40 00000018
3/8-16 .264 .187 .186 1/2 3 5/16 2-1/2 899964-C6 $162.80 00000019
3/8-16 .264 .187 .186 3/4 3 5/16 2-1/2 896464-C6 $169.80 00000020

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