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| Japanese Explosive Ordnance – Army Ammunition – Navy Ammunition |
| Chapter 5 - Section 1 |
| NAVY PROJECTILES |
| 20-mm Armor-Piercing Incendiary Projectile |
| Fuze: None. |
| Weight of projectile: 4.64 ounces. |
| Length of projectile: 3.15 inches. |
| Length of complete round: Mk I, 5.58 inches; Mk II, 6.76 inches. |
| Filling: Incendiary mixture: |
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1. Nitrocellulose: 77.5 percent. |
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2. Sodium nitrate: 11.3 percent. |
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3. Aluminum: 11.2 percent. |
| Weight of filling: 0.12 ounces. |
| Color and markings: White over-all. |
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Remarks: This projectile is unfuzed and has a pointed steel body and a soft copper cap soldered to the nose. The incendiary filling loaded through the base is sealed with a threaded base plug. |
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Upon impact, the rear end of the projectile ruptures and the heat generated ignites the incendiary filling. |
| No modification or similar Swiss ammunition exist. |
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Figure 354 – 20-mm Armor-Piercing Incendiary Projectile. |
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