The Reducer,boss, cataloged under National Stock Number 4730-01-571-5403, 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 15 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-571-5403 |
| Primary Part Number | AS5172-0608 |
| 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 | GASKET SEAL (BOSS) FIRST END |
| Connection Style | FLARELESS (TUBE) SECOND END |
| Nominal Length | 1.153 INCHES ALL ENDS IN |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Nominal Thread Size | 0.750 INCHES SECOND END IN |
| Nominal Thread Size | 0.563 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES SECOND END |
| Nominal Outside Diameter | 0.500 INCHES SECOND END IN |
| Nominal Outside Diameter | 0.375 INCHES FIRST END IN |
| Thread Class | 3A FIRST END A |
| Thread Class | 3A SECOND END A |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) SECOND END |
| 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 |
|---|---|
| AS5172-0608 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| A5172-0608 | 5/9 Secondary reference Sae International Dba Sae International |
| A5172-0608 | 3/9 Design control — primary reference U.S. Government activity |
| AN893-125 | 5/9 Secondary reference U.S. Government activity |
| SAE-AS4875 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AN893-12S | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-571-5403 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 4730-01-571-5403 has 1 manufacturer part number on file: AS5172-0608 (Sae International Dba Sae International).
Key specifications for AS5172-0608: Connection Style: GASKET SEAL (BOSS) FIRST END; Connection Style: FLARELESS (TUBE) SECOND END; Nominal Length: 1.153 INCHES ALL ENDS IN; Connection Type: THREADED INTERNAL BOSS FIRST END. 15 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.