Left Hand Taps and Dies :  Inch Sizes

picture of right hand tap

NC, NF


Left-Hand taps and dies 

These hard-to-find Left-Hand taps and dies  can be indispensible for fabricating or repairing parts that have reversed screw threads, such as linkages or suspension components.

The left-hand taps  and dies are mirror image designs of right-hand taps and dies .

Left hand threads when required twist in a counter clockwise direction.

Screws are often tightened clockwise, which is why most threads are right-handed. Left-hand cutting threads are used if the screw could loosen due to stress.

Left handed threads are used to fasten rotating parts that rotate in anticlockwise direction and the motion tends to tighten the fastener.

 

 

NC (national coarse) Left Hand thread 

Order Left Hand NC taps on line   add to cart

Order Left Hand NC Dies on line   add to cart

Size Threads per Inch Major Outside Diameter
     
No 1 64 .073"
No 2 56 .086"
No 3 48 .099"
     
No 4 40 .112"
No 5 40 .125"
No 6 32 .138"
     
No 8 32 .164"
No 10 24 .190"
No 12 24 .216"
     
1/4" 20 .250"
5/16" 18 .3125"
3/8" 16 .375"
     
7/16" 14 .4375"
1/2" 13 .500"
9/16" 12 .5625"
     
5/8" 11 .625"
3/4" 10 .750"
7/8" 9 .875"
     
1" 8 1.000"
1-1/8" 7 1.125"
1-1/4" 7 1.250"
     
1-3/8" 6 1.375"
1-1/2" 6 1.500"
1-3/4" 5 1.750"
     
2" 4-1/2 2.000"
2-1/4" 4-1/2 2.250"
2-1/2" 4 2.500"

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4-20LH.1 for 1/4-28 Left Hand taper tap
TAP1/4-20LH.2 for 1/4-28 Left Hand plug tap
TAP1/4-20LH.3 for 1/4-28 Left Hand bottoming tap

 

 

NF ( national fine) Left Hand thread

Order Left Hand NF taps on Line  add to cart

Order Left Hand NF dies on Line  add to cart

Size Threads per Inch Major Outside Diameter
No.0 80 .060"
No 1 72 .073"
No 2 64 .086"
No 3 56 .099"
     
No 4 48 .112"
No 5 44 .125"
No 6 40 .138"
     
No 8 36 .164"
No 10 32 .190"
No 12 28 .216"
     
1/4" 28 .250"
5/16" 24 .3125"
3/8" 24 .375"
     
7/16" 20 .4375"
1/2" 20 .500"
9/16" 18 .5625"
     
5/8" 18 .625"
3/4" 16 .750"
7/8" 14 .875"
     
1" 12 1.000"
1-1/8" 12 1.125"
1-1/4" 12 1.250"
     
1-3/8" 12 1.375"
1-1/2" 12 1.500"
1-3/4" 12 1.750"
     

when ordering taps please specify the diameter and pitch and style of tap

example

TAP1/4-28LH.1 for 1/4-28 Left Hand taper tap
TAP1/4-28LH.2 for 1/4-28 Left Hand plug tap
TAP1/4-28LH.3 for 1/4-28 Left Hand bottoming tap

 

We have a huge assortment of standard and special sizes including inch, metric sizes.

Did you know you can order special size taps manufactured in 24 hours?

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