The Reducer,tube, cataloged under National Stock Number 4730-01-204-0643, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Artcraft Machine Corp. Dba Artcraft Machine Corp.. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-204-0643 |
| Primary Part Number | 3361171-2 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Artcraft Machine Corp. Dba Artcraft Machine Corp. |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Nominal Overall Length | 0.922 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Nominal Outside Diameter Tube Accommodated | 0.125 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Nominal Thread Size | 0.312 INCHES SECOND END IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Thread Class | 3A ALL ENDS A |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 3361171-2 | Artcraft Machine Corp. Dba Artcraft Machine Corp. (USA) |
| Reference | Meaning |
|---|---|
| 3361171-2 | 3/2 Design control — primary reference U.S. Government activity |
| 3361171 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-204-0643 is a Reducer,tube, manufactured by Artcraft Machine Corp. Dba Artcraft Machine Corp., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-204-0643 has 1 manufacturer part number on file: 3361171-2 (Artcraft Machine Corp. Dba Artcraft Machine Corp.).
Key specifications for 3361171-2: Connection Style: FLARED (TUBE) ALL ENDS; Nominal Overall Length: 0.922 INCHES IN; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Nominal Outside Diameter Tube Accommodated: 0.125 INCHES SECOND END 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.