The Reducer,tube, cataloged under National Stock Number 4730-01-171-3337, 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 11 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-171-3337 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | GROOVED INSIDE (TUBE) FIRST END |
| Nominal Overall Length | 1.444 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Nominal Outside Diameter Tube Accommodated | 0.312 INCHES FIRST END IN |
| Nominal Thread Size | 0.500 INCHES SECOND END IN |
| Seat Angle | 45.0 DEGREES SECOND END |
| Thread Class | 2A SECOND END A |
| Thread Quantity Per Inch | 16 SECOND END |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UN SECOND END |
| 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 |
|---|---|
| SSN678-501-4361593 | D/9 Drawing number reference only U.S. Government activity |
| SSN678-501-4361593 PIECE 55 | 5/2 Secondary reference U.S. Government activity |
| 77643-65X22 | D/9 Drawing number reference only U.S. Government activity |
| 0678-002 PC5 | C/1 Advisory reference — outside the item-of-supply concept Aluf Industries Inc |
| 77643-65X22 PC55 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-171-3337 is a Reducer,tube, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-171-3337: Connection Style: GROOVED INSIDE (TUBE) FIRST END; Nominal Overall Length: 1.444 INCHES IN; Connection Type: UNTHREADED INTERNAL TUBE FIRST END; Nominal Outside Diameter Tube Accommodated: 0.312 INCHES FIRST END IN. 11 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.