The Reducer,boss, cataloged under National Stock Number 4730-00-187-3597, 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 17 specifications, cited from the U.S. Government catalog. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-187-3597 |
| Item Name | Reducer,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Connection Style | FLARED W/ GASKET SEAL (BOSS) ALL ENDS |
| Nominal Overall Length | 1.891 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Material Document and Classification | QQ-A-225/4,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 1500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 1.625 INCHES FIRST END IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Specification/standard Data | 88044-AN919 GOVERNMENT STANDARD |
| Maximum Operating Temp | 71.0 CELSIUS SINGLE RESPONSE DEGC |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 12 FIRST END |
| Thread Quantity Per Inch | 20 SECOND END |
| Material | ALUMINUM ALLOY 2014 OVERALL |
| Thread Series Designator | UN FIRST END |
| Thread Series Designator | UNF 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 |
|---|---|
| AN919-24D | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| MIL-F-5509 | 4/1 Identification reference U.S. Government activity |
| AN919-24D | 5/1 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| AN919-24D | 5/9 Secondary reference Crown Fitting Co Inc |
| AN919-24D | 5/1 Secondary reference Hydro-Fitting Manufacturing Corporation |
| AN919-24D | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| AN919-24D | 5/1 Secondary reference Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply |
| AN919-24D | 5/9 Secondary reference Collins Engineering Corp |
| AN919-24D | 2/2 Government specification standardization U.S. Government activity |
NSN 4730-00-187-3597 is a Reducer,boss, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-187-3597: Connection Style: FLARED W/ GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 1.891 INCHES IN; Connection Type: THREADED EXTERNAL BOSS ALL ENDS; Material Document and Classification: QQ-A-225/4,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 17 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.