MRC:
						A recording of the physical,functional,and performance characteristics for an item of supply.TEXT
					 
					
						General Description:
					
					
						Material for inlet covers shall have the following chemical composition:  68-70 pct copper navy specification 46-c-5 grade a with zinc remainder navy specification 46-z-1 grade a;  5.34 in. Long;  3.485 in. Inside dia;  0.031 in. Thickness all around;  83.0 in. Radius;  0.38 in. Nose circumference;  inlet cover used for 8 inch 55 caliber projectile mk 14 all mods, mk 15 all mods, mk 16 all mods, mk 17 all mods, mk 19 all mods or mk 27 all mods