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Small Scale UNC Hex Bolts

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UNC Type Head Size Across Flats
Head Height
3-48 5/32 inch 5/64 inch
4-40 11/64 inch 5/64 inch
5-40 3/16 inch 3/32 inch


UNC Hex Steel

Per 25

Per 50

3-48 x 1/4"

3-48 x 1/2"

3-48 x 3/4"

3-48 x 1"

4-40 x 1/4"

4-40 x 1/2"

4-40 x 3/4"

4-40 x 1"

5-40 x 1/4"

5-40 x 1/2"

5-40 x 3/4"

5-40 x 1"




Matching Scale UNC Nuts

(Click below)

UNC Steel Nuts

All of the above is supplied standard self colour - But for an extra nominal charge can be Chemically Coloured Black..

Contact for further details on what you require chemically treated

Chemical Blacking process is run once a week can always add to the running batch

If enough demand happy to supply direct from stock

Further UNC sizes and lengths can be added in the coming months and possibly Cheeseheads if required


e-mail me sales@ba-bolts.co.uk


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