The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-00-640-5041, 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 19 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through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-640-5041 |
| Primary Part Number | MS21915W8-4 |
| 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 |
| Surface Treatment Document and Classification | MIL-A-8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Connection Style | GASKET SEAL (BOSS) FIRST END |
| Nominal Overall Length | 1.484 INCHES IN |
| Connection Type | THREADED INTERNAL BOSS FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Material Document and Classification | QQ-A-225/6,T6,T62,T851 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Specification/standard Data | 96906-MS21915 GOVERNMENT STANDARD |
| Maximum Operating Temp | -65.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Surface Treatment | ANODIZE OVERALL |
| Media for Which Designed | HYDRAULIC FLUID SINGLE RESPONSE |
| Thread Class | 3A SECOND END A |
| Thread Class | 3B FIRST END |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| 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 |
|---|---|
| MS21915D8-4 | Satair A/s (DNK) |
| MS21915W8-4 PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| MS21915D8-4 | 5/9 Secondary reference Globe Aerospace Inc |
| ER894D8-4 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| MS21915D8-4 | 5/1 Secondary reference Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution |
| AS18280 | 5/9 Secondary reference U.S. Government activity |
| AS18280 | 5/1 Secondary reference Sae International Dba Sae International |
| AS21915 | 5/1 Secondary reference Sae International Dba Sae International |
| MS21915D8-4 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| MS21915D8-4 | 5/9 Secondary reference U.S. Government activity |
| MS21915D8-4 | 5/9 Secondary reference U.S. Government activity |
| AS21915 | 5/9 Secondary reference U.S. Government activity |
| MS21915W8-4 | 3/9 Design control — primary reference U.S. Government activity |
| SAE-AS18280 | 3/1 Design control — primary reference Sae International Dba Sae International |
NSN 4730-00-640-5041 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 4730-00-640-5041 has 2 manufacturer part numbers on file: MS21915D8-4 (Satair A/s), MS21915W8-4 (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-483-3852. Verify interchangeability with system specifications before substitution.
Key specifications for MS21915W8-4: Surface Treatment Document and Classification: MIL-A-8625,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Style: GASKET SEAL (BOSS) FIRST END; Nominal Overall Length: 1.484 INCHES IN. 19 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.