The Tee,tube to Boss, cataloged under National Stock Number 4730-01-309-3398, 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 19 specifications, cited from the U.S. Government catalog. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-309-3398 |
| Item Name | Tee,tube to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 TUBE COUPLING NUT W/SLEEVE AND 1 PREFORMED PACKING |
| Connection Type | THREADED EXTERNAL TUBE THIRD END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Nominal Outside Diameter Tube Accommodated | 0.312 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 0.313 INCHES THIRD END IN |
| Leg Length | 1.090 INCHES NOMINAL SECOND END IN |
| Leg Length | 0.891 INCHES NOMINAL THIRD END IN |
| Leg Length | 0.950 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Seat Angle | 12.0 DEGREES THIRD END |
| Seat Angle | 12.0 DEGREES FIRST END |
| Specification/standard Data | 96906-MS51892 GOVERNMENT STANDARD |
| Surface Treatment | PASSIVATE OVERALL |
| Media for Which Designed | HYDRAULIC FLUID FIRST RESPONSE |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Thread Class | 2A ALL ENDS A |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF 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 |
| Reference | Meaning |
|---|---|
| M19-20873 PC NO 158 | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division |
| MIL-F-18866 | 5/9 Secondary reference U.S. Government activity |
| 4RBU-SS | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Corporate Headquarters |
| MS51892-24SS | 5/9 Secondary reference U.S. Government activity |
| 499-00020 | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division |
| MS51892-4SS | 2/2 Government specification standardization U.S. Government activity |
| 4R5BU-SS | 5/1 Secondary reference Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division |
| MIL-DTL-18866 | 4/1 Identification reference U.S. Government activity |
| 4R5BU-SS | 5/9 Secondary reference U.S. Government activity |
| 4-R5BU-B | C/1 Advisory reference — outside the item-of-supply concept Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division |
NSN 4730-01-309-3398 is a Tee,tube to Boss, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-309-3398: Furnished Items and Quantity: 1 TUBE COUPLING NUT W/SLEEVE AND 1 PREFORMED PACKING; Connection Type: THREADED EXTERNAL TUBE THIRD END; Connection Type: THREADED EXTERNAL TUBE FIRST END; Connection Type: THREADED EXTERNAL BOSS SECOND END. 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.