The Reducer,boss, cataloged under National Stock Number 4730-01-645-4995, 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 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-645-4995 |
| Primary Part Number | AS5174W0804 |
| 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 | 1.531 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES FIRST END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.4375 INCHES SECOND END IN |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 16 FIRST END |
| Thread Quantity Per Inch | 20 SECOND END |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNF 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 |
|---|---|
| AS5174W0804 PRIMARY | Sae International Dba Sae International (USA) |
| SAEAS5174W0804 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| SAEAS5174W0804 | 5/9 Secondary reference U.S. Government activity |
| AS5174W0804 | 5/9 Secondary reference U.S. Government activity |
| SAEAS5174 | 5/9 Secondary reference Sae International Dba Sae International |
| SAEAS5174 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-645-4995 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 4730-01-645-4995 has 2 manufacturer part numbers on file: AS5174W0804 (Sae International Dba Sae International), SAEAS5174W0804 (Sae International Dba Sae International).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-723-3808, 4730-01-723-4140. Verify interchangeability with system specifications before substitution.
Key specifications for AS5174W0804: Connection Style: FLARED (TUBE) ALL ENDS; Nominal Overall Length: 1.531 INCHES IN; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Nominal Outside Diameter Tube Accommodated: 0.250 INCHES SECOND END IN. 16 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.