The Reducer,pipe, cataloged under National Stock Number 4730-01-012-3418, 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 18 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-012-3418 |
| Item Name | Reducer,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 BRAZING RING |
| Nominal Pipe Size Accommodated | 3.000 INCHES FIRST END IN |
| Nominal Pipe Size Accommodated | 2.500 INCHES SECOND END IN |
| Connection Style | STREAMLINED W/ ONE BRAZING RING (PIPE) ALL ENDS |
| Nominal Overall Length | 3.690 INCHES IN |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Material Document and Classification | QQ-C-390 FED SPEC 1ST MATERIAL RESPONSE OR ASTM-B61 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Specification/standard Data | 81349-MIL-F-1183J GOVERNMENT SPECIFICATION |
| Maximum Operating Temp | 425.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 150.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Nondefinitive Spec/std Data | 2 FIGURE |
| Pipe Wall Thickness Designation for Which Designed | STANDARD ALL ENDS |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Material | COPPER ALLOY 903 OR COPPER ALLOY 922 OVERALL |
| 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 |
|---|---|
| M1183/8-17A | 2/2 Government specification standardization U.S. Government activity |
| MIL-DTL-1183/8 | 4/1 Identification reference U.S. Government activity |
| MIL-F-1183 | 5/9 Secondary reference U.S. Government activity |
| MILF1183BUSH3X2 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| CS4730-0121-A-26-GLPQ | 5/9 Secondary reference Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) |
| 4699265P29 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4730-01-012-3418 is a Reducer,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-012-3418: Furnished Items and Quantity: 2 BRAZING RING; Nominal Pipe Size Accommodated: 3.000 INCHES FIRST END IN; Nominal Pipe Size Accommodated: 2.500 INCHES SECOND END IN; Connection Style: STREAMLINED W/ ONE BRAZING RING (PIPE) ALL ENDS. 18 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.