The Union,tube, cataloged under National Stock Number 4730-01-084-9689, 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16 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-084-9689 |
| Item Name | Union,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | PLAIN (TUBE) SECOND END |
| Connection Style | SOCKET (TUBE) FIRST END |
| Coupling Flange Shape | HEXAGON |
| Tubing Wall Nominal Thickness for Which Designed | 0.140 INCHES ALL ENDS IN |
| Nominal Overall Length | 6.190 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | UNTHREADED EXTERNAL TUBE SECOND END |
| Style Designator | UNTHREADED |
| Material Document and Classification | QQ-N-281,CLASS A FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | QQ-S-763,COND A3MDCL2BAJBAQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE TAILPIECE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | GASKET |
| Material | NICKEL ALLOY NUT |
| Material | STEEL COMP 304 THREAD PIECE |
| Material | STEEL COMP 304 TAILPIECE |
| Reducer Type | CONCENTRIC |
| 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 |
|---|---|
| 2621-791-03ASSY134MODP | 5/2 Secondary reference U.S. Government activity |
| 2621-791-03ASSY | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 2621-791-03 | D/9 Drawing number reference only U.S. Government activity |
| 14-97-0985 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-084-9689 is a Union,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): 4730-01-128-2311. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-084-9689: Connection Style: PLAIN (TUBE) SECOND END; Connection Style: SOCKET (TUBE) FIRST END; Coupling Flange Shape: HEXAGON; Tubing Wall Nominal Thickness for Which Designed: 0.140 INCHES ALL ENDS IN. 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.