Brass CZ121, Whitworth & BSF Hexagon
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| AF Size | Whitworth | BSF |
|---|---|---|
| 0.445" | 3/16" | 1/4" |
| 0.525" | 1/4" | 5/16" |
| 0.600" | 5/16" | 3/8" |
| 0.710" | 3/8" | 7/16" |
| 0.820" | 7/16" | 1/2" |
| 0.920" | 1/2" | 9/16" |
| 1.010" | 9/16" | 5/8" |
| 1.100" | 5/8" | 11/16" |
| 1.200" | 11/16" | 3/4" |
| 1.300" | 3/4" | 7/8" |
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