The Reducer,boss, cataloged under National Stock Number 4730-00-187-3574, 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 Smiths Tubular Systems-Laconia, Inc.. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-187-3574 |
| Primary Part Number | 115048-5 |
| Item Name | Reducer,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Smiths Tubular Systems-Laconia, Inc. |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 PREFORMED PACKING |
| Connection Style | FLARED W/ GASKET SEAL (BOSS) ALL ENDS |
| Nominal Overall Length | 1.172 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Material Document and Classification | QQ-A-225/4,T6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Size | 0.375 INCHES FIRST END IN |
| Nominal Thread Size | 0.312 INCHES SECOND END IN |
| Specification/standard Data | 88044-AN919 GOVERNMENT STANDARD |
| Surface Treatment | ANODIZE OVERALL |
| Thread Class | 3A ALL ENDS A |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) 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 |
|---|---|
| 115048-5 | Smiths Tubular Systems-Laconia, Inc. (USA) |
| AN919-0D | Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA) |
| AN919-0D | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| AN919-0D | Hydro-Fitting Manufacturing Corporation (USA) |
| AN919-0D | Satair A/s (DNK) |
| Reference | Meaning |
|---|---|
| AN919-0D | 5/9 Secondary reference Collins Engineering Corp |
| AS4841 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AN919-0D | 5/9 Secondary reference U.S. Government activity |
| AN919-0D | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| AS4841 | 5/9 Secondary reference U.S. Government activity |
| AN919-0D | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| AN919-0D | 5/9 Secondary reference Crown Fitting Co Inc |
NSN 4730-00-187-3574 is a Reducer,boss, manufactured by Smiths Tubular Systems-Laconia, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-187-3574 has 5 manufacturer part numbers on file: 115048-5 (Smiths Tubular Systems-Laconia, Inc.), AN919-0D (Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply), AN919-0D (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), AN919-0D (Hydro-Fitting Manufacturing Corporation), AN919-0D (Satair A/s).
1 possible match (shared part number, not a government interchangeability claim): 4730-00-277-5352. Verify interchangeability with system specifications before substitution.
Key specifications for 115048-5: Furnished Items and Quantity: 2 PREFORMED PACKING; Connection Style: FLARED W/ GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 1.172 INCHES IN; Connection Type: THREADED EXTERNAL BOSS ALL ENDS. 14 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.