The Reducer,boss, cataloged under National Stock Number 4730-00-231-1326, 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through both NSN and commercial part number lookups. 11 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-231-1326 |
| Primary Part Number | AS5172D0408 |
| 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 | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Connection Style | GASKET SEAL (BOSS) FIRST END |
| Nominal Overall Length | 0.781 INCHES 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 | 0.438 INCHES FIRST END IN |
| Surface Treatment | ANODIZE INSIDE |
| Surface Treatment | ANODIZE OUTSIDE |
| Thread Class | 3A SECOND END A |
| Thread Class | 3B FIRST END |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNF 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 |
| Part Number | Manufacturer |
|---|---|
| AS5172D0408 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| A-A 59616 | 5/9 Secondary reference U.S. Government activity |
| A-A 59616 | 5/1 Secondary reference Sae International Dba Sae International |
| SAE-AS4875 | 3/1 Design control — primary reference Sae International Dba Sae International |
| 8537251 | 5/9 Secondary reference Us Army Aviation and Missile Command |
| AS5172D0408 | 5/9 Secondary reference U.S. Government activity |
| SAE AS4875 | 5/9 Secondary reference U.S. Government activity |
| AS5172 | 5/1 Secondary reference Sae International Dba Sae International |
| AS5172 | 5/9 Secondary reference U.S. Government activity |
| AN893-3D | 5/9 Secondary reference U.S. Government activity |
| 90944 | 5/9 Secondary reference Eaton Aerospace, Llc Dba Jackson South |
| 4730PL0839043 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 4730-00-231-1326 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 4730-00-231-1326 has 1 manufacturer part number on file: AS5172D0408 (Sae International Dba Sae International).
3 possible matches (shared part number, not a government interchangeability claim): 5960-00-387-6331, 1005-01-556-2104, 7021-01-700-1196. Verify interchangeability with system specifications before substitution.
Key specifications for AS5172D0408: Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Style: GASKET SEAL (BOSS) FIRST END; Nominal Overall Length: 0.781 INCHES 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.