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UNF Steel Button Heads

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

The lists below show our range of UNF (Unified Fine) HT Steel Button Head socket screws.

The range is limited to 10 -32 UNF and 1/4-28 UNF at present but more sizes will added in due course. If you have a particular requirement please e mail us and we do our best to help.

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.

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.


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 Metric and UNC in 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.

All prices include 20% VAT  Click here for details

Button Head Socket Screws

UNF Threads - High Tensile Steel 


Length L*

Pack Qty

MF Ref

Price You can enter/change the number of items on the order form
Inches mm AF
10 UNF              
10-32 3/8 9.5 5 MF-BH141F £0.85

25 MF-BH141F/25 £3.40

10-32 1/2 12.7 5 MF-BH142F £0.85

25 MF-BH142F/25 £3.40

10-32 3/4 19.05 5 MF-BH143F £0.85

25 MF-BH143F/25 £3.40

10-32 1 25.4 5 MF-BH144F £0.95

25 MF-BH144F/25 £3.80

10-32 1 1/4 31.75 5 MF-BH145F £0.95

25 MF-BH145F/25 £3.80

10-32 1 1/2 38.1 5 MF-BH146F £0.95

5 MF-BH146F/25 £3.80

Driving Tools for 10 - 32 UNF 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

* Metric dimensions have been converted from inch dimensions
1/4" UNC              
1/4-20 3/8 9.5 5 MF-BH147F £1.00

25 MF-BH147F/25 £4.00

1/4-20 1/2 12.7 5 MF-BH148F £1.00

25 MF-BH148F/25 £4.00

1/4-20 3/4 19.05 5 MF-BH149F £1.15

25 MF-BH149F/25 £4.60

1/4-20 1 25.4 5 MF-BH150F £1.25

25 MF-BH150F/25 £5.00

Driving Tools for 1/4 - 28 UNF 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




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



This page was last modified on : February 07, 2024

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