The Coupling,tube, cataloged under National Stock Number 4730-00-953-0683, 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 13 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-953-0683 |
| Primary Part Number | B-400-A-4ANF |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 SHORT COUPLING NUT AND 2 FERRULE SLEEVE |
| Connection Style | SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END SECOND END |
| Connection Style | SWIVEL NUT W/ LOOSE OR INTEGRAL CLINCH SLEEVE (TUBE) FIRST END |
| Nominal Overall Length | 1.234 INCHES IN |
| Connection Type | THREADED INTERNAL TUBE ALL ENDS |
| Style Designator | SWIVEL, WRENCHING FACILITIES EACH END |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Nominal Thread Size | 0.438 INCHES ALL ENDS IN |
| Seat Angle | 37.0 DEGREES SECOND END |
| Seat Angle | 20.0 DEGREES FIRST END |
| Thread Class | 3B ALL ENDS |
| Material | COPPER 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 |
|---|---|
| B-400-A-4ANF PRIMARY | Swagelok Co (USA) |
| 4AAN4 PRIMARY | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| 4-4 X6HBZ6-B PRIMARY | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| CV0181-009 | Northrop Grumman Corp Electronic Systems Defensive System Div (USA) |
| Reference | Meaning |
|---|---|
| 4AAN4 | 5/9 Secondary reference J R Douglass Company |
NSN 4730-00-953-0683 is a Coupling,tube, manufactured by Swagelok Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-953-0683 has 4 manufacturer part numbers on file: B-400-A-4ANF (Swagelok Co), 4AAN4 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), 4-4 X6HBZ6-B (Parker-Hannifin Corporation Div Instrumentation Products Division), CV0181-009 (Northrop Grumman Corp Electronic Systems Defensive System Div).
Key specifications for B-400-A-4ANF: Furnished Items and Quantity: 1 SHORT COUPLING NUT AND 2 FERRULE SLEEVE; Connection Style: SWIVEL NUT, FLARE (TUBE) STYLE 3 OPTIONAL END SECOND END; Connection Style: SWIVEL NUT W/ LOOSE OR INTEGRAL CLINCH SLEEVE (TUBE) FIRST END; Nominal Overall Length: 1.234 INCHES IN. 13 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.