The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-00-188-8019, 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-188-8019 |
| Primary Part Number | AS5173-0403 |
| Item Name | Adapter,straight,tube to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) FIRST END |
| Connection Style | GASKET SEAL (BOSS) SECOND END |
| Nominal Overall Length | 1.297 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED INTERNAL BOSS SECOND END |
| Nominal Outside Diameter Tube Accommodated | 0.188 INCHES FIRST END IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.375 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Specification/standard Data | 81343-AS4875/1 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A FIRST END A |
| Thread Class | 3B SECOND END |
| Material | STEEL 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 |
|---|---|
| 313110700 | B-N Group Ltd (GBR) |
| AS5173-0403 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| AN894-4-3 | 5/9 Secondary reference U.S. Government activity |
| MS24398-4-3 | 5/9 Secondary reference U.S. Government activity |
| AS4875/1 | 5/9 Secondary reference U.S. Government activity |
| SAE-AS4875/1 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MIL-F-5509 | 5/9 Secondary reference U.S. Government activity |
| AS5173-0403 | 5/9 Secondary reference U.S. Government activity |
| AS4875/1 | 5/9 Secondary reference Sae International Dba Sae International |
NSN 4730-00-188-8019 is a Adapter,straight,tube to Boss, manufactured by Sae International Dba Sae International, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-188-8019 has 2 manufacturer part numbers on file: 313110700 (B-N Group Ltd), AS5173-0403 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 4730-00-835-5010. Verify interchangeability with system specifications before substitution.
Key specifications for AS5173-0403: Connection Style: FLARED (TUBE) FIRST END; Connection Style: GASKET SEAL (BOSS) SECOND END; Nominal Overall Length: 1.297 INCHES IN; Connection Type: THREADED EXTERNAL TUBE 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.