Hand Tap Taper ISO 529 Form A HSS-G left hand thread - BSW 1" x 8 LH supports controlled thread cutting when you select it by thread system and apply it in a stable, guided setup. It fits typical shop workflows in machine building, service, and metal fabrication.
BSW denotes a Whitworth inch thread, typically used when older drawings or replacement parts specify Whitworth threads. Left hand thread means the tool is intended for threads that tighten opposite to standard right hand threads. ISO 529 indicates the referenced standard family or tool standard named in the product designation. HSS-G means ground high speed steel, which is commonly used when you need stable cutting behavior and clean thread flanks.
Note Clean threads and tools before use, apply suitable lubrication for cutting operations, and stop if resistance rises sharply.
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| Type of thread | Whitworth-Thread |
|---|---|
| Standard | ISO 529 |
| Form | Form A |
| Material | HSS-G |
| Tolerance | medium |
| Size | BSW 1" x 8 LH |
| Overall length (L1) | 130 mm |
| Thread length (L2) | 45 mm |
| Core hole diameter (D1) | 22.0 mm |
| Shank diameter (D2) | 18.0 mm |
| Drive connector | 14.0 mm |
| Item number | 84319-1 |
| Type of flute | straight fluted |
| Application | for through holes |
| Thread standard | BS 84 |









