This page lists our range of High Tensile* UNC Countersunk (sometimes called 'flat head') Screws with socket heads.
*Some sizes also available and indicated below in stainless steel
We stock various lengths in 2-56, 4-40, 6-32 and 8-32
thread (2, 4, 6 and 8 UNC)
To order, click on the 'Add to Order' button alongside the item of your choice. You can select the quantity on the order form (default is 1). To continue ordering other items, use the 'Continue Shopping' button on the order form.
You can review and edit your order, or submit your order at any time by using the button at the bottom of each list.
All dimensions are inches
For a guide to suitable washers, please scroll to the bottom of the page or click here
Socket sizes are stated in millimetres (imperial sizes have been converted to metric). If you need a key, click on the symbol in the tables below and you will be taken to the allen key and ball driver page.
Note that the length of countersunk screws is the length including the screw head and all our UNC countersunk screws are fully threaded.
Many more sizes are available - if the size you require isn't listed please e mail us for a no-obligation quotation.
For thread data, click here (this will open in a new browser window)
All prices include 20% VAT Click here for details
For UNC nuts - click here
For flat and spring washers - click here
We do not stock specific UNC washers, but the following metric equivalents can be used for general applications :-
If the size you require isn't listed please e mail us for a no-obligation quotation.
This page was last modified on : April 15, 2022
Send mail to
questions or comments about this web site.