The Union,tube, cataloged under National Stock Number 4730-01-197-4775, 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 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-197-4775 |
| Item Name | Union,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 4 BRAZING RING |
| Connection Style | SOCKET BRAZING RING (TUBE) ALL ENDS |
| Coupling Flange Shape | ROUND |
| Nominal Overall Length | 2.375 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE ALL ENDS |
| Style Designator | UNTHREADED |
| Material Document and Classification | MIL-B-994,COMP MIL SPEC SINGLE MATERIAL RESPONSE AND QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE AND MIL-B-16541 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES ALL ENDS IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Seat Type | RECESSED |
| Material | COPPER ALLOY BODY |
| Material | SILVER BRAZING RING |
| 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 |
|---|---|
| 810-1385889 1/2 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 810-1385889 | D/9 Drawing number reference only U.S. Government activity |
| 810-1385889 1/2INODTY1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-197-4775 is a Union,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-197-4775: Furnished Items and Quantity: 4 BRAZING RING; Connection Style: SOCKET BRAZING RING (TUBE) ALL ENDS; Coupling Flange Shape: ROUND; Nominal Overall Length: 2.375 INCHES IN. 12 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.