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ISO 529.
For use in diestocks to produce external screw threads.
| Dimensions Standard | BS 1127 |
| Thread Direction | Right Hand |
| Thread Standard | UNF |
| Outside Diameter | 1-5/16in |
| Material | HSS |
| Thickness | 7/16in |
| Thread Size | 1/2in. x 20 |
| Class of Fit | 2A |
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