The Tube Assembly,metal, cataloged under National Stock Number 4710-01-321-5539, is classified within Federal Supply Class 4710 (Pipe, Tube and Rigid Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4710-01-321-5539 |
| Primary Part Number | 1128H40012-273P4 |
| Item Name | Tube Assembly,metal |
| FSC / FSG | 4710 / 47 — Pipe, Tube and Rigid Tubing |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Design Form | PREBENT |
| Mating End Quantity | 2 SINGLE END |
| Thread Direction | RIGHT-HAND SINGLE END |
| Thread Class | 3B SINGLE END |
| Material | ALUMINUM ALLOY OR STEEL TUBING |
| End Connection Spec/std | AN,AN818,P/N AN818-4 AND MIL,MS20819 P/N,MS20819-4 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1128H40012-273P4 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1128H40012-273P4 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| 1128H40012 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
NSN 4710-01-321-5539 is a Tube Assembly,metal, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4710, Pipe, Tube and Rigid Tubing. Status: active.
NSN 4710-01-321-5539 has 1 manufacturer part number on file: 1128H40012-273P4 (Northrop Grumman Systems Corporation).
Key specifications for 1128H40012-273P4: Design Form: PREBENT; Mating End Quantity: 2 SINGLE END; Thread Direction: RIGHT-HAND SINGLE END; Thread Class: 3B SINGLE END. 6 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.