MS21903-4: ADAPTER,STRAIGHT,TUBE TO BOSS.
The ADAPTER,STRAIGHT,TUBE TO BOSS is a the manufacturer industrial component. Key specifications include material: STEEL COMP 1137 OVERALL, seat_angle: 12.0 DEGREES FIRST END, thread_class: 3A CENTER BULKHEAD A, connection_type: THREADED EXTERNAL TUBE FIRST END, connection_style: FLARELESS (TUBE) FIRST END, special_features: WEAPON SYSTEM ESSENTIAL. This part is cataloged in the U.S.
Government catalog under NSN 4730-00-541-1750, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.
Verify compatibility with your specific system configuration before ordering.
| material | STEEL COMP 1137 OVERALL |
| seat_angle | 12.0 DEGREES FIRST END |
| thread_class | 3A CENTER BULKHEAD A |
| connection_type | THREADED EXTERNAL TUBE FIRST END |
| connection_style | FLARELESS (TUBE) FIRST END |
| special_features | WEAPON SYSTEM ESSENTIAL |
| surface_treatment | CADMIUM OVERALL |
| nominal_thread_size | 0.438 INCHES ALL ENDS IN |
| nominal_overall_length | 1.656 INCHES IN |
| end_item_identification | 25F AIRCRAFT, AWACS, E-3A A |
| thread_series_designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| specification/standard_data | 96906-MS21925 GOVERNMENT STANDARD |
| NSN | 4730-00-541-1750 |
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 1,CLASS 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| CONNECTION STYLE | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| CONNECTION STYLE | FLARELESS (TUBE) FIRST END |
| NOMINAL OVERALL LENGTH | 1.656 INCHES IN |
| CRITICALITY CODE JUSTIFICATION | FEAT |
| CONNECTION TYPE | THREADED EXTERNAL TUBE FIRST END |
| CONNECTION TYPE | THREADED EXTERNAL BOSS SECOND END |
| MATERIAL DOCUMENT AND CLASSIFICATION | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| NOMINAL OUTSIDE DIAMETER TUBE ACCOMMODATED | 0.250 INCHES FIRST END IN |
| NOMINAL THREAD SIZE | 0.438 INCHES CENTER BULKHEAD IN |