The Nipple,tube, cataloged under National Stock Number 4730-00-409-3903, 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 Swagelok Co. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-409-3903 |
| Primary Part Number | B400-61-4AN |
| Item Name | Nipple,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 BULKHEAD NUT AND 2 FERRULE SLEEVE AND 1 SHORT COUPLING NUT |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | FLARELESS (TUBE) FIRST END BULKHEAD |
| Nominal Overall Length | 1.828 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END BULKHEAD |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | FLARED AND FLARELESS W/ BULKHEAD THREAD |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES SECOND END IN |
| Leg Length | 0.410 INCHES MINIMUM AND 0.550 INCHES MAXIMUM SECOND END IN |
| Leg Length | 1.031 INCHES NOMINAL FIRST END BULKHEAD IN |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Seat Angle | 37.0 DEGREES SECOND END |
| Seat Angle | 20.0 DEGREES FIRST END |
| Thread Class | 2A ALL ENDS A |
| Material | COPPER ALLOY 360 OR COPPER ALLOY OVERALL |
| Thread Series Designator | UNF ALL ENDS |
| Thread Series Designator | UNF FIRST END BULKHEAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4 XABC 4 | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| B400-61-4AN PRIMARY | Swagelok Co (USA) |
| 4-4XH2BZ-B | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| Reference | Meaning |
|---|---|
| 3307853-1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 400-61-4AN | 5/9 Secondary reference Swagelok Co |
NSN 4730-00-409-3903 is a Nipple,tube, manufactured by Swagelok Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-409-3903 has 3 manufacturer part numbers on file: 4 XABC 4 (Parker-Hannifin Corporation Div Instrumentation Products Division), B400-61-4AN (Swagelok Co), 4-4XH2BZ-B (Parker-Hannifin Corporation Div Instrumentation Products Division).
Key specifications for B400-61-4AN: Furnished Items and Quantity: 1 BULKHEAD NUT AND 2 FERRULE SLEEVE AND 1 SHORT COUPLING NUT; Connection Style: FLARED (TUBE) SECOND END; Connection Style: FLARELESS (TUBE) FIRST END BULKHEAD; Nominal Overall Length: 1.828 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.
NSN 4730-00-409-3903 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.