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BSW AND SELF TAPPING SCREWSClick an underlined link below to jump to that listB.S.W. Stainless Bolts
B.S.W. Stainless Nuts
Self-Tapping Screws
Standard Washers and Penny Washers
BSW / UNC
BSW is usually compatible with UNC, the only different one is 1/2", the rest are interchangeable. The only noticable difference between them is that the BSW have a slightly larger head size, (for the purist there is 5 degree difference in the pitch angle), which is not really significant.
The threads per inch are the same (except for 1/2"). Generally BSW and BSF was used on English cars and motorcycles until the 1960s, after that and on American cars and motorcycles UNC (coarse) tended to be used, in conjunction with UNF (fine).
If you are uncertain of any threads you can mail them to me in a padded envelope and I will identify them for you, or just replace them with new for you.
B.S.W. Stainless Bolts | Hex | Slot Round Head | Slot Cheese Head | Slot C'Sunk | Slot Raised Head |
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3/16 x 1/2 | 25p | 20p | 20p | 20p | 20p |
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3/16 x 5/8 | 25p | 25p | 20p | | 25p |
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3/16 x 3/4 | 25p | 25p | 25p | 25p | |
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3/16 x 1 | 30p | 30p | 30p | 25p | 25p |
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3/16 x 1¼ | 35p | 30p | 30p | 25p | 35p |
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3/16 x 1½ | 45p | 35p | 30p | 30p | |
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3/16 x 2 | 55p | 40p | 35p | 30p | 40p |
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3/16 x 3 | | 50p | | 40p | |
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| Hex | Slot Round Head | Slot Cheese Head | Slot C'Sunk | Slot Raised Head |
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1/4 x 1/2 | 25p | 25p | 30p | 20p | 30p |
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1/4 x 5/8 | 25p | 30p | 35p | | 35p |
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1/4 x 3/4 | 30p | 30p | 35p | 30p | 40p |
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1/4 x 1 | 30p | 35p | 40p | 35p | 45p |
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1/4 x 1¼ | 35p | 35p | 45p | | |
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1/4 x 1½ | 40p | 35p | 50p | 35p | 60p |
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1/4 x 2 | 70p | 40p | 50p | 40p | |
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1/4 x 2½ | 75p | 50p | 70p | 45p | 75p |
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1/4 x 3 | £1.05 | 75p | 75p | 50p | |
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1/4 x 4 | | | | 50p | |
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| Hex | Slot Round Head | Slot Cheese Head | Slot C'Sunk | Slot Raised Head |
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5/16 x 3/4 | 55p | 45p | | | |
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5/16 x 1 | 60p | | 30p | 70p | 70p |
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5/16 x 1¼ | 70p | 50p | | | |
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5/16 x 1½ | 80p | 60p | 40p | 80p | |
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5/16 x 2 | 95p | | 45p | £1.00 | |
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5/16 x 2½ | £1.10 | | | | |
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5/16 x 3 | £1.25 | | | | £1.25 |
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| Hex |
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3/8 x 1 | 80p |
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3/8 x 1½ | 95p |
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3/8 x 2 | £1.15 |
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3/8 x 2½ | £1.25 |
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3/8 x 3 | £1.50 |
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B.S.W. Stainless Nuts | B.S.W Nuts |
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1/8 | 15p |
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3/16 | 15p |
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1/4 | 15p |
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5/16 | 20p |
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3/8 | 25p |
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7/16 | 70p |
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1/2 | 80p |
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Self-Tapping Screws | Pozi Pan | Pozi Raised C'Sunk | Pozi Flange | Slot Pan | Slot Raised C'Sunk | Slot C'Sunk | Pozi C'Sunk |
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No.4x3/8 | 5p | 5p | 5p | 5p | | 5p | |
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No.4 x 1/2 | 5p | 5p | | 5p | 5p | 5p | |
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No.4 x 3/4 | 5p | 5p | | | 5p | | |
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No.4 x 1 | 10p | 10p | | | 10p | | |
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No.6 x 3/8 | 5p | | 5p | 5p | 5p | 5p | |
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No.6 x 1/2 | 5p | 5p | 5p | 5p | 5p | 5p | 5p |
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No.6 x 3/4 | 10p | 10p | 10p | | 10p | 10p | 10p |
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No.6 x 1 | 10p | 10p | | 10p | 10p | 10p | |
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No.6 x 1½ | 10p | 10p | | 10p | 10p | | 10p |
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| Pozi Pan | Pozi Raised C'Sunk | Pozi Flange | Slot Pan | Slot Raised C'Sunk | Slot C'Sunk | Pozi C'Sunk | Hex |
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No.8 x 3/8 | 5p | | | 10p | | | | |
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No.8 x 1/2 | 10p | 10p | 10p | 10p | 10p | 10p | 10p | |
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No.8 x 3/4 | 10p | 10p | 10p | | 10p | | 10p | |
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No.8 x 1 | 10p | 10p | 10p | 10p | 10p | 10p | | |
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No.8 x 1¼ | 10p | | | 10p | 10p | | | |
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No.8 x 1½ | 15p | 10p | | | 10p | | 10p | |
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No.10 x 1/2 | 10p | 10p | 10p | 10p | 10p | 10p | | 10p |
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No.10 3/4 | 10p | 10p | 15p | | 10p | | 10p | 10p |
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No.10 x 1 | 15p | 10p | 15p | 10p | 10p | 10p | 10p | |
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No.10x1½ | 15p | 15p | | | | | 10p | |
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| Pozi Pan | Hex |
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No.12 x 3/4 | 10p | 15p |
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No.12 x 1 | 15p | |
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No.12 x 1½ | 15p | |
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No.14 x 3/4 | 15p | 15p |
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No.14 x 1 | 15p | 15p |
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No.14 x 1¼ | 20p | |
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Standard Washers and Penny Washers | Flat | Thick | Thick Small O.D. | Spring | Spring H.D. | Screw Cup | Shake Proof | Nylon | Crinkle |
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1/8 | 5p | | | 5p | | | | | |
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3/16 | 5p | 5p | | 5p | 5p | 5p | 5p | 5p | 5p |
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1/4 | 5p | 5p | 5p | 5p | 5p | 10p | 5p | 5p | 5p |
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5/16 | 5p | 5p | 5p | 5p | 5p | | 5p | 5p | 5p |
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3/8 | 5p | 15p | 5p | 5p | 10p | | 5p | 5p | 10p |
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7/16 | 10p | 25p | | 10p | 15p | | | | |
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1/2 | 10p | 15p | 10p | 10p | 15p | | 10p | | 15p |
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9/16 | 15p | 20p | | 15p | 15p | | 10p | | |
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5/8 | 15p | 20p | 20p | 15p | 20p | | 10p | | |
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3/4 | 25p | | | | | | | | |
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7/8 | 30p | | | | | | | | |
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1 | 40p | | | | | | | | |
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| 3/16 | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 |
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1/2 | 5p | | | | | |
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9/16 | 5p | | | | | |
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5/8 | | 10p | | | | |
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11/16 | | 10p | | | | |
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3/4 | 10p | 15p | 10p | | | |
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13/16 | | | 10p | | | |
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7/8 | | | | 15p | | |
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15/16 | | | | 15p | | |
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1 | 15p | 15p | 15p | | | |
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1 x 1/8 | | | | | | 20p |
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1 x 1/4 | 15p | 15p | 15p | 20p | | |
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1 x 3/8 | | | | 20p | | |
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1 x 1/2 | | | 20p | | | |
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2 | | | | | 50p | |
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