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Stainless UNC Button Heads

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You are here - Home > Fixings > Socket Screws > UNC Stainless Steel Button Head Screws

The lists below show our range of UNC Stainless Steel Button Head socket screws.

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.

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

You can review and edit your order, or submit your order at any time by using the button at the bottom of each list.

We also stock button head screws in UNC HT Steel, Metric HT Steel and stainless steel - please use the buttons above to go to these pages.

Button heads have a smaller socket size and shallower depth socket than the equivalent sized cap screw and so more care should be taken not to over-torque, especially on the very small sizes, to avoid rounding of the socket edges.
It's also crucial to ensure that your hex key of driver is completely inserted before applying significant torque.
If your application is for a high torque connection or the screws will be regularly removed and re-used, we would suggest that a socket cap screw is considered.

UNC Button Head Dimensions 'D' & 'AF' in mm (see dimension drawing below)
Thread 2-56 4-40 6-32 8-32 10-24
Head Dia 'D'* 3.9 5.2 6.4 7.8 9.0
Socket Size 'AF' 1.27 1.6 2.0 2.4 3.2
*Head dimensions are nominal and may vary marginally from batch to batch.
 
Please scroll down this page to the thread size you require,
or click on the links below
2 UNC
(2-56)
  4 UNC
(4-40)
  6 UNC
(6-32)
  8 UNC
(8-32)
  10 UNC
(10-24)
  1/4 UNC
(1/4-20)

All prices include 20% VAT  Click here for details

Button Head Socket Screws

UNC Threads - A2 Stainless Steel 

   
2 UNC Please scroll down to the bottom of this 2 UNC
section for for related ancillaries and tools
Thread

Overall Length

Socket size 

Pack
Qty

MF Ref

Pack
Price

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

Inches mm A/F
mm
2-56 1/4 6.35 5 MF-BH101S £0.85

25 MF-BH101S/25 £3.60

               
2-56 3/8 9.5 5 MF-BH102S £0.85

25 MF-BH102S/25 £3.60

               
2-56 1/2 12.7 5 MF-BH103S £0.85

25 MF-BH103S/25 £3.60

               
2-56 3/4 19.05 5 MF-BH105S £1.15

25 MF-BH105S/25 £4.60

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

1.27mm Hex/Ball Driver MF-BD-13 £2.75

               

Popular ancillary items often ordered with 2 UNC Stainless Steel Button Head  Screws

  Description Pack
Qty
Pack Price

 

    Description Pack
Qty
Pack Price  

2UNC S/Steel
Hex Nuts
10 £0.70

 

*M2 St Steel
Flat Washers
20 £0.80

2UNC S/Steel
Nyloc Nuts
10 £0.90

  *M2 St Steel
Spring Washers
20 £0.40

                     
To see our full range of nuts and/or order
larger quantities, please click here
  To see our full range of washers and/or order
larger quantities, please click here
            *M2 washers are suitable for use with 2 UNC screws

4 UNC Please scroll down to the bottom of this 4 UNC
section for for related ancillaries and tools
Thread

Overall Length

Socket size 

Pack
Qty

MF Ref

Pack
Price

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

Inches mm A/F
mm
             
4-40 1/4 6.35 5 MF-BH110S £1.00

25 MF-BH110S/25 £4.50

               
4-40 3/8 9.5 5 MF-BH111S £1.00

25 MF-BH111S/25 £4.50

               
4-40 1/2 12.7 5 MF-BH112S £1.00

25 MF-BH112S/25 £4.50

               
4-40 3/4 19.05 5 MF-BH114S £1.15

25 MF-BH114S/25 £4.60

               
4-40 1 25.4 5 MF-BH115S £1.15

25 MF-BH115S/25 £4.60

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

1/16" Hex/Ball Driver MF-BD-62 £2.75

Popular ancillary items often ordered with 4 UNC Stainless Button Head Screws

  Description Pack
Qty
Pack Price

 

    Description Pack
Qty
Pack Price  

4 UNC Stainless Steel Hex Nuts 10 £0.70

 

M3* St. Steel
Flat Washers
20 £0.70

4 UNC Stainless Steel Nyloc Nuts 10 £0.90

  M3* St. Steel
Spring Washers
20 £0.50

                     
To see our full range of nuts and/or order
larger quantities, please click
here
  To see our full range of washers and/or order
larger quantities, please click
here
            *M3 washers are suitable for use with 4 UNC screws

6 UNC Please scroll down to the bottom of this 6 UNC
section for for related ancillaries and tools
Thread

Overall Length

Socket size 

Pack
Qty

MF Ref

Pack
Price

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

Inches mm A/F
mm
6-32 3/16 4.75 5 MF-BH119S £0.85

25 MF-BH119S/25 £3.60

               
6-32 1/4 6.35 5 MF-BH120S £0.85

25 MF-BH120S/25 £3.60

               
6-32 3/8 9.5 5 MF-BH121S £0.85

25 MF-BH121S/25 £3.60

     
6-32 1/2 12.7 5 MF-BH122S £0.85

25 MF-BH122S/25 £3.60

               
6-32 5/8 15.9 5 MF-BH123S £0.85

25 MF-BH123S/25 £3.60

             
6-32 3/4 19 5 MF-BH124S £0.85

25 MF-BH124S/25 £3.60

               
6-32 1 25.4 5 MF-BH125S £0.85

25 MF-BH125S/25 £3.60

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

2.0mm Hex/Ball Driver MF-BD-20 £2.75

             

Popular ancillary items often ordered with 6 UNC Stainless Steel Button Head Screws

  Description Pack
Qty
Pack Price

 

    Description Pack
Qty
Pack
Price
 

6UNC Stainless
Steel Hex Nuts
10 £0.70

 

*M3.5 St/Steel
Flat Washers
20 £0.80

6UNC Stainless
Steel Nyloc Nuts
10 £0.90

  *M3.5 St/Steel
Spring Washers
20 £0.50

                     
To see our full range of nuts and/or order
larger quantities, please click here
  To see our full range of washers and/or order
larger quantities, please click here
            *M3.5 washers are suitable for use with 6 UNC screws

8 UNC Please scroll down to the bottom of this 8 UNC
section for for related ancillaries and tools
Thread

Overall Length

Socket size 

Pack
Qty

MF Ref

Pack
Price

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

Inches mm A/F
mm
8-32 3/8 9.5 5 MF-BH131S £0.85

25 MF-BH131S/25 £3.60

     
8-32 1/2 12.7 5 MF-BH132S £0.85

25 MF-BH132S/25 £3.60

     
8-32 5/8 15.9 5 MF-BH133S £0.85

25 MF-BH133S/25 £3.60

               
8-32 3/4 19.05 5 MF-BH135S £0.85

25 MF-BH135S/25 £3.60

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

2.4mm (3/32") Hex/Ball Driver MF-BD-66 £3.25

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

               

Popular ancillary items often ordered with 8 UNC Button Head Screws

  Description Pack
Qty
Pack Price

 

    Description Pack
Qty
Pack Price  

8 UNC Stainless Steel Hex Nuts 10 £0.80

 

M4* Stainless Steel
Flat Washers
20 £0.70

8 UNC Stainless Steel Nyloc Nuts 10 £0.90

  M4* Stanless Steel
Spring Washers
20 £0.50

                     
To see our full range of nuts and/or order
larger quantities, please click
here
  To see our full range of washers and/or order
larger quantities, please click
here
            *M4 washers are suitable for use with 8 UNC screws

10 UNC Please scroll down to the bottom of this 10 UNC
section for for related ancillaries and tools
Thread

Overall Length

Socket size 

Pack
Qty

MF Ref

Pack
Price

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

Inches mm A/F
mm
               
10-24 3/8 9.5 5 MF-BH141S £0.85

25 MF-BH141S/25 £3.60

               
10-24 1/2 12.7 5 MF-BH142S £0.85

25 MF-BH142S/25 £3.60

               
10-24 3/4 19.05 5 MF-BH144S £0.85

25 MF-BH144S/25 £3.60

               
10-24 1 25.4 5 MF-BH145S £0.85

25 MF-BH145S/25 £3.60

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

3.2mm (1/8") Hex/Ball Driver MF-BD-69 £3.45

               

Popular ancillary items often ordered with 10 UNC Stainless Steel Button Head Screws

  Description Pack
Qty
Pack Price

 

    Description Pack
Qty
Pack
Price
 

10UNC Stainless
Steel Hex Nuts
10 £0.80

 

*M5 St/Steel
Flat Washers
20 £0.70

10UNC Stainless
Steel Nyloc Nuts
10 £1.00

  *M5 St/Steel
Spring Washers
20 £0.60

                     
To see our full range of nuts and/or order
larger quantities, please click here
  To see our full range of washers and/or order
larger quantities, please click here
            *M5 washers are suitable for use with 10 UNC screws

1/4" UNC Please scroll down to the bottom of this 1/4 UNC
section for for related ancillaries and tools
Thread

Overall Length

Socket size 

Pack
Qty

MF Ref

Pack
Price

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

Inches mm A/F
mm
               
1/4 - 20 3/8 9.5 5 MF-BH147S £0.85

25 MF-BH147S/25 £3.60

               
  Sorry - this item is temporarily out of stock  
1/4 - 20 1/2 12.7 5 MF-BH148S £0.85

25 MF-BH148S/25 £3.60

               
1/4 - 20 3/4 19.05 5 MF-BH149S £0.85

25 MF-BH149S/25 £3.60

               
1/4 - 20 1 25.4 5 MF-BH150S £0.85

25 MF-BH150S/25 £3.60

               
Driving Tools for 8 - 32 UNC Socket Button Head Screws
               
4.0mm Hex/Allen Key MF-HK-40 £0.60

4.0mm Hex/Ball Driver MF-BD-40 £3.45

4.0mm T Handle Driver MF-TH-40 £5.95

4mm Swivel Wrench MF-BSHW4 £8.25

               
               

* Metric dimensions have been converted from inch dimensions

 

This page was last modified on : May 29, 2024

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