The Reducer,boss, cataloged under National Stock Number 4730-00-618-7399, 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-618-7399 |
| Primary Part Number | AS5174J0808 |
| Item Name | Reducer,boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE |
| Surface Treatment Document and Classification | MIL-F-14072,E300,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE |
| Connection Style | FLARED W/ GASKET SEAL (BOSS) ALL ENDS |
| Nominal Overall Length | 1.288 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | FLARED W/ CENTER WRENCHING FACILITY |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES ALL ENDS IN |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES ALL ENDS |
| Surface Treatment | PASSIVATE INSIDE |
| Surface Treatment | PASSIVATE OUTSIDE |
| Thread Class | 3A ALL ENDS A |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| 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 |
|---|---|
| AS5174J0808 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AN815-8J | 5/9 Secondary reference Arlington Air Parts Inc |
| AN815-8J | 5/9 Secondary reference Crown Fitting Co Inc |
| AS5174 | 5/9 Secondary reference Sae International Dba Sae International |
| AS5174 | 5/9 Secondary reference U.S. Government activity |
| AN815-8J | 5/9 Secondary reference U.S. Government activity |
| 4730PL0673365 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| AS4841 | 5/9 Secondary reference U.S. Government activity |
| AS4841 | 5/9 Secondary reference Sae International Dba Sae International |
| AS5174J0808 | 5/9 Secondary reference U.S. Government activity |
| SAE-AS4841 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 4730-00-618-7399 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 4730-00-618-7399 has 1 manufacturer part number on file: AS5174J0808 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 4730-00-885-9442. Verify interchangeability with system specifications before substitution.
Key specifications for AS5174J0808: Surface Treatment Document and Classification: MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE INSIDE; Surface Treatment Document and Classification: MIL-F-14072,E300,TY 2 MIL SPEC SINGLE TREATMENT RESPONSE OUTSIDE; Connection Style: FLARED W/ GASKET SEAL (BOSS) ALL ENDS; Nominal Overall Length: 1.288 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.
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.