The Union,tube, cataloged under National Stock Number 4730-00-413-3837, 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 16 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-413-3837 |
| Item Name | Union,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 BULKHEAD NUT AND 2 SHORT COUPLING NUT WITH SLEEVE |
| Connection Style | FLARELESS (TUBE) ALL ENDS |
| Nominal Overall Length | 2.312 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END BULKHEAD |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Style Designator | FLARELESS W/ BULKHEAD THREADS |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Nominal Thread Size | 0.438 INCHES FIRST END BULKHEAD IN |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Seat Angle | 12.000 DEGREES ALL ENDS |
| Media for Which Designed | OIL SINGLE RESPONSE |
| Thread Class | 2A FIRST END BULKHEAD A |
| Thread Class | 2A ALL ENDS A |
| Material | PLASTIC POLYAMIDE NYLON OVERALL |
| Thread Series Designator | UNF ALL ENDS |
| Thread Series Designator | UNF FIRST END BULKHEAD |
| 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 |
|---|---|
| 282-N-04CP | 5/2 Secondary reference U.S. Government activity |
| 21-19743PC18 | 3/2 Design control — primary reference U.S. Government activity |
| 282-N-04 | 5/9 Secondary reference U.S. Government activity |
| 50-012-11N400 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 282N1-4 | 3/9 Design control — primary reference Imperial |
NSN 4730-00-413-3837 is a Union,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4730-00-863-5965, 4730-01-519-8223. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-413-3837: Furnished Items and Quantity: 1 BULKHEAD NUT AND 2 SHORT COUPLING NUT WITH SLEEVE; Connection Style: FLARELESS (TUBE) ALL ENDS; Nominal Overall Length: 2.312 INCHES IN; Connection Type: THREADED EXTERNAL TUBE FIRST END BULKHEAD. 16 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.