The Reducer,boss, cataloged under National Stock Number 4730-00-231-1325, 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 Hamilton Sundstrand Corporation Dba Collins Aerospace. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 15 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-231-1325 |
| Primary Part Number | AS5172D0406L |
| Item Name | Reducer,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hamilton Sundstrand Corporation Dba Collins Aerospace |
| Status | ACTIVE |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Connection Style | GASKET SEAL (BOSS) FIRST END |
| Nominal Overall Length | 1.109 INCHES IN |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Nominal Thread Size | 0.562 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 |
|---|---|
| AS5172D0406L | Crown Fitting Co Inc (USA) |
| AS5172D0406L PRIMARY | Hamilton Sundstrand Corporation Dba Collins Aerospace (USA) |
| AS5172D0406L | B. & E. Manufacturing Co., Inc. Dba B & E Manufacturing Co Inc (USA) |
| AS5172D0406L PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AN893-2D | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| AN893-2D | 5/1 Secondary reference Curtiss-Wright Controls, Inc. Div Actuation Division |
| 5099D4 | 5/9 Secondary reference Curtiss-Wright Controls, Inc. Div Actuation Division |
| AN893-2D | 5/1 Secondary reference Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply |
| AN893-2D | 5/1 Secondary reference Satair A/s |
| AN893-2D | 5/9 Secondary reference U.S. Government activity |
| SAE-AS4875 | 3/1 Design control — primary reference Sae International Dba Sae International |
| 4730PL2220258 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AN893-2D | 5/1 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| AN893-2D | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| AN893-2D | 5/1 Secondary reference Aerofit, Llc |
| AS5172D0406L | 3/9 Design control — primary reference U.S. Government activity |
| AN893-2D | 5/9 Secondary reference Crown Fitting Co Inc |
| AN893-2D | 5/9 Secondary reference Arlington Air Parts Inc |
| AN893-2D | 5/9 Secondary reference Collins Engineering Corp |
NSN 4730-00-231-1325 is a Reducer,boss, manufactured by Hamilton Sundstrand Corporation Dba Collins Aerospace, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-231-1325 has 4 manufacturer part numbers on file: AS5172D0406L (Crown Fitting Co Inc), AS5172D0406L (Hamilton Sundstrand Corporation Dba Collins Aerospace), AS5172D0406L (B. & E. Manufacturing Co., Inc. Dba B & E Manufacturing Co Inc), AS5172D0406L (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 5365-00-804-7915. Verify interchangeability with system specifications before substitution.
Key specifications for AS5172D0406L: Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Style: GASKET SEAL (BOSS) FIRST END; Nominal Overall Length: 1.109 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.