Trev's Vintage Machine Shop

This is a set of BSF (Britsh Standard Fine) dome nuts, also known as acorn cap nuts. Each nut has a nicely rounded cap that protects the end of the male thread. These are good quality nuts made from stainless steel.

They are available in the following sizes:

Thread SizeWidthDepthSpanner size
1/4 BSF (26 TPI)0.443 in across flats0.497 in deepFits a 3/16 Whitworth spanner


They are sold in sets of 2, 4, 6, 8 or 10 nuts. These are dispatched quickly via Royal Mail Tracked 48, with Tracked 24 and Special Delivery available at extra cost.

Not what you want? Return the item unused for a refund.

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Free postage to UK mainland only. If you have any questions then please ask.