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| PartNumber | M85049/1821N07 | M85049/1821N03 | M85049/1821N06 |
| Description | Circular MIL Spec Backshells Straight Backshell | Circular MIL Spec Backshells STRAIGHT BACKSHELL SZ 21 NICKEL | Circular MIL Spec Backshells Straight Backshell |
| Manufacturer | Amphenol Pcd | Glenair | Glenair |
| Product Category | MIL Spec Connectors | Circular Connectors - Backshells and Cable Clamps | Circular Connectors - Backshells and Cable Clamps |
| Series | AS85049 | Military, SAE AS85049 | Military, SAE AS85049 |
| Product | Environmental EMI/RFI Backshells | - | - |
| Part Aliases | A850491821N07A | - | - |
| Shell Style | Straight | - | - |
| Shell Size | 21 | - | - |
| Shell Plating | Electroless Nickel | - | - |
| Mounting Angle | Straight | - | - |
| MIL Type | MIL-DTL-38999 III IV | - | - |
| Mating Style | Rotatable Coupling | - | - |
| Shell Material | Aluminum Alloy | - | - |
| Color | - | Silver | Silver |
| Material | - | Aluminum | Aluminum |
| Type | - | Backshell, Cable Clamp | Backshell, Cable Clamp |
| Features | - | Clamp Screws | Clamp Screws |
| Ingress Protection | - | Environment Resistant | Environment Resistant |
| Shielding | - | Shielded | Shielded |
| Shell Size Insert | - | 21 | 21 |
| Cable Opening | - | 0.250" ~ 0.375" (6.35mm ~ 9.52mm) | 0.625" ~ 0.750" (15.88mm ~ 19.05mm) |
| Diameter Outside | - | 1.550" (39.37mm) | 1.550" (39.37mm) |
| Thread Size | - | M31x1 | M31x1 |
| Cable Exit | - | 180° | 180° |
| Plating | - | Electroless Nickel | Electroless Nickel |