The Nipple,tube, cataloged under National Stock Number 4730-01-031-3278, 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 Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-031-3278 |
| Primary Part Number | 4126-578000 |
| Item Name | Nipple,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn |
| Status | ACTIVE |
| Connection Style | FLARELESS (TUBE) ALL ENDS |
| Nominal Overall Length | 2.813 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | FLARELESS W/ BULKHEAD THREADS |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES ALL ENDS IN |
| Leg Length | 1.875 INCHES NOMINAL FIRST END IN |
| Leg Length | 0.688 INCHES NOMINAL SECOND END IN |
| Nominal Thread Size | 0.562 INCHES ALL ENDS IN |
| Seat Angle | 12.000 DEGREES ALL ENDS |
| Thread Class | 3A ALL ENDS A |
| Material | ALUMINUM ALLOY 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 |
| Part Number | Manufacturer |
|---|---|
| 4126-578000 PRIMARY | Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn (USA) |
| 2-01001D12 PRIMARY | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| AP1003-12 PRIMARY | Sps Technologies, Llc Dba Airdrome Precision Components (USA) |
| AFP821D12 | Aerofit, Llc (USA) |
| ER-01727 | Danfoss Power Solutions II, Llc (USA) |
| Reference | Meaning |
|---|---|
| BACU24E12D | 3/2 Design control — primary reference U.S. Government activity |
| ER-01727 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| 31739-12D | 5/9 Secondary reference Faber Enterprises, Inc. Div Faber Enterprise Inc |
| DBOU24E12D | 5/9 Secondary reference Designed Metal Connections Inc Dba Permaswage Usa Div Permaswage, a Pcc Company |
NSN 4730-01-031-3278 is a Nipple,tube, manufactured by Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-031-3278 has 5 manufacturer part numbers on file: 4126-578000 (Parker Hannifin Corp Stratoflex Div Aircraft Fittings Opn), 2-01001D12 (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), AP1003-12 (Sps Technologies, Llc Dba Airdrome Precision Components), AFP821D12 (Aerofit, Llc), ER-01727 (Danfoss Power Solutions II, Llc).
Key specifications for 4126-578000: Connection Style: FLARELESS (TUBE) ALL ENDS; Nominal Overall Length: 2.813 INCHES IN; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Style Designator: FLARELESS W/ BULKHEAD THREADS. 12 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.