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UNC HT Countersunks

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You are here - Home > Fixings > Socket Screws > UNC HT Steel Countersunk Screws
   
 

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)
And now more rare sizes in 3-48 and 5-40 (3 and 5 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.

Alternatively,

Please click here

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.

We also stock a range of nylon countersunk screws screws including some UNC sizes. These are listed in the nylon screw section. Click here to go to the relevant web page.

For stainless steel and HT steel Metric and UNF countersunks, please use the buttons at the top of this page.

For thread data, click here  (this will open in a new browser window)

All prices include 20% VAT  Click here for details

Countersunk Socket Screws 

UNC - High Tensile Steel    Black finish 

Thread

Length
L
(inches)

Socket
Size
(A/F)
Pack
Qty

MF Ref

Price

You can enter/change the number of items on the order form

             
2UNC            
           
2-56  3/16 5 MF-CS100 £0.85

25 MF-CS100/25 £3.60

             
2-56  1/4 5 MF-CS101 £0.85

25 MF-CS101/25 £3.60

             
2-56 3/8 5 MF-CS102 £0.85

25 MF-CS102/25 £3.60

             
2-56 1/2 5 MF-CS103 £0.85

25 MF-CS103/25 £3.60

Driving Tools for 2-56 UNC Socket Countersunk Screws
1.27mm (0.05") Hex/Allen Key MF-HK-13 £0.60

1.27mm Hex/Ball Driver MF-BD-13 £2.75

           
3 UNC            
           
3-48  3/16 5 MF-CS105 £0.85

25 MF-CS105/25 £3.60

             
3-48 1/4 5 MF-CS106 £0.85

25 MF-CS106/25 £3.60

Driving Tools for 3-48 UNC Socket Countersunk Screws
1.27mm (0.05") Hex/Allen Key MF-HK-13 £0.60

1.27mm Hex/Ball Driver MF-BD-13 £2.75

           
4 UNC            
           
4 -40 1/4 5 MF-CS110 £0.85

25 MF-CS110/25 £3.60

             
4-40 3/8 5 MF-CS111 £0.85

25 MF-CS111/25 £3.60

             
4-40 1/2 5 MF-CS112 £0.85

25 MF-CS112/25 £3.60

             
4-40
(4 UNC)
3/4 5 MF-CS114 £0.85

25 MF-CS114/25 £3.60

             
4 -40 1 5 MF-CS115 £0.85

25 MF-CS115/25 £3.60

Driving Tools for 4-40 UNC Socket Countersunk Screws
1.6mm (1/16") Hex/Allen Key MF-HK-16 £0.60

1/16" Hex/Ball Driver MF-BD-62 £2.75

           
5 UNC            
           
5-40 1/4 5 MF-CS116 £0.85

25 MF-CS116/25 £3.60

             
5-40 3/8 5 MF-CS117 £0.85

25 MF-CS117/25 £3.60

             
5-40 1/2 5 MF-CS118 £0.85

25 MF-CS118/25 £3.60

             
5-40 3/4 5 MF-CS119 £0.85

25 MF-CS119/25 £3.60

Driving Tools for 5-40 UNC Socket Countersunk Screws
1.6mm (1/16") Hex/Allen Key MF-HK-16 £0.60

1/16" Hex/Ball Driver MF-BD-62 £2.75

           
6 UNC            
           
6-32 1/4 5 MF-CS120 £0.85

25 MF-CS120/25 £3.60

             
6-32 3/8 5 MF-CS121 £0.85

25 MF-CS121/25 £3.60

             
6-32 1/2 5 MF-CS122 £0.85

25 MF-CS122/25 £3.60

             
6-32 5/8 5 MF-CS123 £0.85

25 MF-CS123/25 £3.60

             
6-32 3/4 5 MF-CS124 £0.85

25 MF-CS124/25 £3.60

             
6-32 1 5 MF-CS125 £1.15

25 MF-CS125/25 £4.60

             
6-32 1 1/2 5 MF-CS127 £1.15

25 MF-CS127/25 £4.60

Driving Tools for 6-32 UNC Socket Countersunk Screws
2.0mm Hex/Allen Key MF-HK-20 £0.50

2.0mm Hex/Ball Driver MF-BD-20 £2.75

           
8 UNC            
           
8-32 3/8 5 MF-CS131 £0.85

25 MF-CS131/25 £3.60

             
8-32 1/2 5 MF-CS132 £0.85

25 MF-CS132/25 £3.60

             
8-32 3/4 5 MF-CS133 £0.85

25 MF-CS133/25 £3.60

             
8-32 1 5 MF-CS134 £0.85

25 MF-CS134/25 £3.60

Driving Tools for 8-32 UNC Socket Countersunk Screws
2.4mm (3/32) Hex/Allen Key MF-HK-24 £0.60

2.4mm (3/32") Hex/Ball Driver MF-BD-66 £2.75

2.4mm (3/32") T Handle Driver MF-TH-332 £4.95

           
10 UNC            
           
10-24 3/8 5 MF-CS141 £0.85

25 MF-CS141/25 £3.60

             
10-24 1/2 5 MF-CS142 £0.85

25 MF-CS142/25 £3.60

             
10-24 3/4 5 MF-CS143 £0.85

25 MF-CS143/25 £3.60

             
10-24 1 5 MF-CS144 £0.85

25 MF-CS144/25 £3.60

             
10-24 1 1/4 5 MF-CS145 £1.25

25 MF-CS145/25 £5.30

             
10-24 1 1/2 5 MF-CS146 £1.50

25 MF-CS146/25 £6.35

Driving Tools for 10-24 UNC Socket Countersunk Screws
3.2mm (1/8") Hex/Allen Key MF-HK-32 £0.60

3.2mm (1/8") Hex/Ball Driver MF-BD-69 £3.15

           
1/4 UNC            
           
1/4-20 3/8   5 MF-CS151 £1.00

25 MF-CS151/25 £4.25

             
1/4-20 1/2   5 MF-CS152 £1.00

25 MF-CS152/25 £4.25

             
1/4-20 3/4   5 MF-CS154 £1.00

25 MF-CS154/25 £4.25

             
  Sorry - this item is temporarily out of stock  
1/4-20 1   5 MF-CS156 £1.00

25 MF-CS156/25 £4.25

             
1/4-20 1 1/4   5 MF-CS157 £1.25

25 MF-CS157/25 £5.30

Driving Tools for 8-32 UNC Socket Countersunk Screws
4.0mm (5/32") Hex/Allen Key MF-HK-40 £0.60

4.0mm (5/32") Hex/Ball Driver MF-BD-72 £3.35

4.0mm (5/32") T Handle Driver MF-TH-532 £4.95

             

 

 

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 :-

UNC / UNF Screw size 2 3 4 5 6 8 10 1/4
Suitable Metric Washer Size M2 M2.5 M3 M3 M3.5 M4 M5 M6

 

If the size you require isn't listed please e mail us for a no-obligation quotation.

This page was last modified on : May 29, 2021

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