The Coupling,tube, cataloged under National Stock Number 4730-01-180-0891, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-180-0891 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-B-16541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | STREAMLINED W/ ONE BRAZING RING (TUBE) ALL ENDS |
| Nominal Overall Length | 0.875 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | PLAIN |
| Material Document and Classification | MIL-B-16541 MIL SPEC 1ST MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | COPPER ALLOY OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 810-1385944 | D/9 Drawing number reference only U.S. Government activity |
| 810-1385944 PIE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 810-1385944PC3 1/4 IN. O.D. | 3/2 Design control — primary reference U.S. Government activity |
| 810-1385944 1/4 IN. O.D. | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-180-0891 is a Coupling,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-180-6052. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-180-0891: Surface Treatment Document and Classification: MIL-B-16541 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: STREAMLINED W/ ONE BRAZING RING (TUBE) ALL ENDS; Nominal Overall Length: 0.875 INCHES IN; Connection Type: UNTHREADED INTERNAL TUBE ALL ENDS. 9 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.