The Adapter,straight,pipe to Boss, cataloged under National Stock Number 4730-00-628-0670, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-628-0670 |
| Item Name | Adapter,straight,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE INSIDE |
| Connection Style | FLARED W/ GASKET SEAL (BOSS) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Nominal Overall Length | 0.260 INCHES IN |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Material Document and Classification | MIL-F-18866 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Nominal Thread Size | 1.062 INCHES SECOND END IN |
| Specification/standard Data | 81349-MIL-F-18866 GOVERNMENT SPECIFICATION AND 96906-MS51503 GOVERNMENT STANDARD |
| Maximum Operating Temp | 121.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Nondefinitive Spec/std Data | 1 CLASS AND 1 TYPE AND 2 STYLE |
| Surface Treatment | PASSIVATE INSIDE |
| Media for Which Designed | HYDRAULIC FLUID SINGLE RESPONSE |
| Thread Class | 2A SECOND END A |
| Thread Quantity Per Inch | 12 SECOND END |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UN SECOND END |
| Thread Series Designator | NPTF FIRST END |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS51503B12S | 2/2 Government specification standardization U.S. Government activity |
| MS51503B12S | 5/1 Secondary reference Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) |
| MIL-F-18866 | 4/1 Identification reference U.S. Government activity |
| 6876363 | 5/1 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
NSN 4730-00-628-0670 is a Adapter,straight,pipe to Boss, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-00-959-5790. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-00-628-0670: Surface Treatment Document and Classification: QQ-P-35,TY 2 FED SPEC SINGLE TREATMENT RESPONSE INSIDE; Connection Style: FLARED W/ GASKET SEAL (BOSS) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Nominal Overall Length: 0.260 INCHES IN. 20 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.