SPI 20-967-6 Screw Thread 64-3.5 TPI / 0.4-7mm Anvil Set (6 Pairs)
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The SPI 20-967-6 is a new 6-pair screw thread micrometer anvil set covering a combined range of 64–3.5 TPI (inch series) and 0.4–7 mm pitch (metric series), providing matched V-anvil and spindle tip pairs for measuring external screw thread pitch diameters on standard outside micrometers equipped for thread measurement. Each pair consists of a cylindrical shank spindle tip and a V-groove anvil machined to contact the thread flanks at the correct included angle, enabling accurate pitch-diameter readings per ASME B1 and ISO thread standards. The set is packaged in a labeled plastic storage case and is manufactured in China to SPI's published tolerances for interchangeable thread anvil accessories. Compatible with SPI and similarly dimensioned outside thread micrometers that accept interchangeable anvil/spindle tip sets; buyers should confirm shank diameter compatibility with their specific micrometer frame before ordering.
Product Specifications
| Brand | SPI |
| MPN | 20-967-6 |
| Set Contents | 6 pairs (12 pcs total) |
| Inch Thread Range | 64–3.5 TPI |
| Metric Thread Range (Pitch) | 0.4–7 mm |
| Anvil Type | V-groove screw thread anvil & spindle tip pairs |
| Condition | New |
| Country of Origin | China |
| Storage | Plastic case included |