The Reducer,boss, cataloged under National Stock Number 4730-01-549-8331, 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 Sae International Dba Sae International. Government technical data includes 9 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-549-8331 |
| Primary Part Number | AS5174D0404V |
| Item Name | Reducer,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) ALL ENDS |
| Nominal Overall Length | 1.250 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Material Document and Classification | QQ-A-225/6 OR TYPE 2024-T851 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Size | 0.437 INCHES ALL ENDS IN |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3A ALL ENDS A |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| 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 |
|---|---|
| AS5174D0404V PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| 10482637 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| AS5174 | 5/9 Secondary reference Sae International Dba Sae International |
| AS5174 | 5/9 Secondary reference U.S. Government activity |
| AS4841 | 5/9 Secondary reference U.S. Government activity |
| AS5174D0404V | 5/9 Secondary reference U.S. Government activity |
| AS4841 | 5/9 Secondary reference Sae International Dba Sae International |
| SAE-AS5174 | 3/1 Design control — primary reference Sae International Dba Sae International |
| SAE-AS4841 | 5/1 Secondary reference Sae International Dba Sae International |
| 4730PL1876262 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4730-01-549-8331 is a Reducer,boss, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-549-8331 has 1 manufacturer part number on file: AS5174D0404V (Sae International Dba Sae International).
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-578-8310, 4730-01-645-4995, 4730-01-723-3808. Verify interchangeability with system specifications before substitution.
Key specifications for AS5174D0404V: Connection Style: FLARED (TUBE) ALL ENDS; Nominal Overall Length: 1.250 INCHES IN; Connection Type: THREADED EXTERNAL BOSS ALL ENDS; Material Document and Classification: QQ-A-225/6 OR TYPE 2024-T851 FED SPEC ALL MATERIAL RESPONSES OVERALL. 9 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.