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This page lists our range of UNC taps including
No4, No6, No8, No10,No12,1/4" and 5/16" including taper, second and bottom
taps.
Also listed below are tap wrenches suitable for use with these taps.
Other thread forms also available including
Metric Coarse, Metric
fine, other UNC sizes, UNF, BA,
BSF, BSW, BSP, NPT, Model
Engineer (ME)
- please click on the thread name to go to the relevant page, or
e mail us with your requirements.
Please note that these are high quality professional
standard taps that with correct care and use will give many years of service.
Not to be confused with the cheaper and inferior 'market stall' quality tools
that are available from some sources and are good
for a couple of holes and
completely useless when used with certain materials.
All our taps and dies are manufactured from HSS (High
Speed Steel) or HQS (a manufacturers brand name for HSS
with improved toughness
properties). We do not stock low grade carbon steel taps and dies.
These taps are suitable for working with a large range of
hard and soft ferrous and non-ferrous metals including stainless steel.
If you have any
queries regarding the type of tap you need for a particular job, please do not
hesitate to send your
questions by e mail
to us and we will do our very best to assist.
For information on thread data, please click
here
(opens in a new browser window - please close when
finished, to return to this page).
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For our range of Tap Wrenches please scroll to
the bottom of this page or click on the image. |
All prices include 20% VAT
Click
here for details
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An Explanation of Unified
Thread Nomenclature |
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The Unified system of
threads originates and is primarily used in the USA
and comprises of two main groups.
The coarse pitch range is termed as UNC (as listed on this page)
The finer pitched range is termed UNF
The nomenclature of all
Unified threads takes the form of one or two digits,
or a fraction size, followed by a hyphen, followed by 2 more digits.
Sizes below 1/4" nominal diameter are identified by a series of
gauge numbers
and takes the form of a one or two digit number before the hyphen.
Sizes of 1/4" or higher simply have the size in inches before the
hypen.
The digits following the hyphen indicate the number of threads per
inch ('TPI')
So as an example, a 4unc
thread is fully expressed as a 4-40 thread
This has a diameter of No 4 gauge with 40 threads per inch
You can find much much
more details of UNC and other threads on our
Thread Data
page
including nominal diameters of the gauge sizes converted to
millimeters. |
This page was last modified on :
December 08, 2024
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