Hanson Carbon Steel Taper Tap 4-40 Thread

Product #: 789274 Hanson #: 1012 ZR UPC #: 20042526010129
$2.19

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Product Information

Hanson's high strength taps are useful for any number of machining projects, threading the interior surface of a hole to correspond with the desired thread pitch of a given screw, bolt or other part. This taper tap (also known as a starter tap) utilizes a pronounced chamfer that is 7 to 10 threads in length, creating a gradual cutting action that requires less torque than a plug tap due to the increased number of cutting teeth. Ideal for use when the material to be tapped is difficult to work, such as alloy steel, or when using more fragile, small diameter taps. Featuring a square drive head, the tap can be paired with a Hanson T-handle tap wrench (sold separately) for manual operation, or attached to a lathe or drill press for greater precision and speed.

For a complete list of available taps and associated drill bit sizes, please refer to the "Technical Specifications & Use" link below.

Technical Information

Tap Types and Suggested Uses:
  • Bottom tap has a chamfer (taper at the end) that is 1 to 2 threads long. Use for threading close to the bottom of blind holes.
  • Plug tap has a chamfer that is 3 to 5 threads long. The most common chamfer for use by hand or for machine tapping through blind holes.
  • Taper tap has a chamfer that is 7 to 10 threads long. Easier starting and requires less tapping torque because of the number of working teeth. Also known as a starter tap.

  • All taps have a square drive head. Size of square and overall length of tap will vary by tap size.


    Click Here for a Comprehensive List of Drill and Tap Sizes, along with pertinent dimensional details.
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