The Reducer,boss, cataloged under National Stock Number 4730-00-187-0490, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 18 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4730-00-187-0490 |
| Primary Part Number | AS5174-1616 |
| Item Name | Reducer,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Furnished Items and Quantity | 2 PREFORMED PACKING |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC 1ST TREATMENT RESPONSE AND MIL-H-6083 MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| Connection Style | FLARED W/ GASKET SEAL (BOSS) ALL ENDS |
| Nominal Overall Length | 2.188 INCHES IN |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Style Designator | FLARED W/ CENTER WRENCHING FACILITY |
| Nominal Thread Size | 1.312 INCHES ALL ENDS IN |
| Specification/standard Data | 88044-AN815 GOVERNMENT STANDARD |
| Surface Treatment | CADMIUM OVERALL |
| Media for Which Designed | OXYGEN, GASEOUS SECOND RESPONSE |
| Media for Which Designed | HYDRAULIC FLUID FIRST RESPONSE |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT (UNJ) ALL ENDS |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AS5174-1616 PRIMARY | Sae International Dba Sae International (USA) |
| 4916-16 | Sun Test Systems B.v. (NLD) |
| Reference | Meaning |
|---|---|
| AS4841 | 5/9 Secondary reference U.S. Government activity |
| D016F0 | 5/9 Secondary reference Del Mfg Co |
| AN815-16 | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| 5365001870490 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| AN815-16 | 5/9 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| AN815-16 | 5/9 Secondary reference U.S. Government activity |
| AN815-16 | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
| AS5174-1616 | 5/9 Secondary reference B. & E. Manufacturing Co., Inc. Dba B & E Manufacturing Co Inc |
| AS5174 | 5/9 Secondary reference Sae International Dba Sae International |
| AS5174-1616 | 5/9 Secondary reference U.S. Government activity |
| AS4841 | 5/9 Secondary reference Sae International Dba Sae International |
| AS5174 | 5/9 Secondary reference U.S. Government activity |
| SAE-AS4841 | 3/1 Design control — primary reference Sae International Dba Sae International |
| AN815-16 | 5/9 Secondary reference Crown Fitting Co Inc |
| AN815-16 | 5/9 Secondary reference Hydro-Fitting Manufacturing Corporation |
| AN815-16 | 5/9 Secondary reference Collins Engineering Corp |
| AN815-16 | 5/9 Secondary reference Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply |
| AN815-16 | 5/9 Secondary reference Satair A/s |
NSN 4730-00-187-0490 is a Reducer,boss, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: cancelled.
NSN 4730-00-187-0490 has 2 manufacturer part numbers on file: AS5174-1616 (Sae International Dba Sae International), 4916-16 (Sun Test Systems B.v.).
3 possible matches (shared part number, not a government interchangeability claim): 4730-00-804-1929, 5325-01-187-0490, 5340-01-427-8420. Verify interchangeability with system specifications before substitution.
Key specifications for AS5174-1616: Furnished Items and Quantity: 2 PREFORMED PACKING; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC 1ST TREATMENT RESPONSE AND MIL-H-6083 MIL SPEC 2ND TREATMENT RESPONSE OVERALL; Connection Style: FLARED W/ GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 2.188 INCHES IN. 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.
NSN 4730-00-187-0490 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.