Bolts & Set Screws

British Association screw threads, or BA screw threads, are a largely obsolete set of small screw threads, the largest being  0BA at 6 mm diameter. They were used by Lucas in many of the instruments and also found in handles, windscreens and many of the chrome items.

UNC and UNF are symbols of Unified Screw Thread Series

The Unified Thread Series was agreed on by the United States, Great Britain and Canada in 1949 to obtain interchangeability.
The Unified Thread Series is classified into coarse threads, fine threads and extra fine threads much like Metric screw threads are.

  • UNC: Is the symbol for Unified coarse pitch threads.
  • UNF: Is the symbol for Unified fine pitch threads.

C154F
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C155F
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C157F
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F030
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F035A

Screw 6BA x 1/4 Raised Countersunk Slotted Chrome

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F039A
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F039B
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F040
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F040AS
F040AS
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F040CP
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Screw 2BA x 1.50 Chrome Slotted

  • MG Magnette Mk 3
  • MG Magnette Mk 4
  • Riley 4/68
  • Riley 4/72
F045CS
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F318
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F320
F320
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F321
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F321A
F321A
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F324
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F325
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F326
F326
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F327
F327
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Screw M6 x 60 Raised Countersunk Slotted Polished S/S

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F368
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F377
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F387
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Screw 3/16 x 3/8 UNC Panhead Pozi

  • All Models
F390
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Screw 3/16 x 1/4 UNF Panhead Pozi

  • All Models
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