British Standard Fine

British Standard Fine (BSF) is a screw thread form, as a fine-pitch alternative to British Standard Whitworth (BSW) thread. It was used for steel bolts and nuts on much British machinery, including cars, prior to adoption of Unified, and later Metric, standards.

T-Nut-Round 1/4 BSF

F014
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F015
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Cage For Nut (Zinc) All Size

F067
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Nut + Cage 1/4 BSF

F067D
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Nut + Cage 5/16 BSF

F067E
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Nut (For Cage) 3/8 BSF

F067F
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Nut 1/4 BSF

F103
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Nut 1/4 BSF Self Locking

F103L
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Nut 5/16 BSF

F104
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Nut 5/16 BSF Self Locking

F104L
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Nut 5/16 BSF Slotted

F104S
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Nut 3/8 BSF

F105
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Nut 3/8 BSF Self Locking

F105L
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Nut 3/8 BSF Slotted

F105S
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Nut 7/16 BSF

F106
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Nut 1/2 BSF (Aero)

F106L
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Nut 1/2 BSF

F107
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F107A
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Nut 9/16 BSF

F108
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Nut 9/16 BSF Self Locking

F108L
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