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| U.S. EXPLOSIVE ORDNANCE |
| PART 1 - PROJECTILES, PROPELLANT, AND PROECTILE FUZES |
| Chapter 4 - PRIMERS AND TRACERS |
| Section 2 - PRIMERS |
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Percussion Primer Mk 21 Mods 0 and 1 (Obsolete) |
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Over-all length, inches |
2.9 (approx.) |
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Diameter of body, inch |
0.54 |
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Material |
Brass |
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How secured |
Screws into case; R.H. threads |
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Charge |
64 grains black powder |
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Cap |
Mixture of lead sulfocyanate, potassium chlorate, and antimony sulfide |
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Guns used in |
40-mm Brass Case Mk 1 |
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Figure 110. Primers (not proportionate sizes) |
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