The Coupling,tube, cataloged under National Stock Number 4730-01-321-6423, 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 Hydrasearch Company, Llc. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-321-6423 |
| Primary Part Number | 4-202240-12-12 |
| Item Name | Coupling,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hydrasearch Company, Llc |
| Status | ACTIVE |
| Connection Style | FLARED (TUBE) SECOND END |
| Connection Style | SOCKET W/ GROVE (TUBE) FIRST END |
| Nominal Overall Length | 2.040 INCHES IN |
| Connection Type | UNTHREADED INTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Style Designator | RIGID, SHORT CENTER WRENCHING FACILITY |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.750 INCHES FIRST END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Thread Size | 1.062 INCHES SECOND END IN |
| Seat Angle | 37.0 DEGREES SECOND END |
| Thread Class | 2A SECOND END A |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNF SECOND END |
| 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 |
|---|---|
| 4-202240-12-12 PRIMARY | Hydrasearch Company, Llc (USA) |
| Reference | Meaning |
|---|---|
| 4-202240-12-12 | 3/9 Design control — primary reference Danfoss Power Solutions II, Llc |
| 4-202240 | D/9 Drawing number reference only Danfoss Power Solutions II, Llc |
NSN 4730-01-321-6423 is a Coupling,tube, manufactured by Hydrasearch Company, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-321-6423 has 1 manufacturer part number on file: 4-202240-12-12 (Hydrasearch Company, Llc).
Key specifications for 4-202240-12-12: Connection Style: FLARED (TUBE) SECOND END; Connection Style: SOCKET W/ GROVE (TUBE) FIRST END; Nominal Overall Length: 2.040 INCHES IN; Connection Type: UNTHREADED INTERNAL TUBE FIRST END. 15 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.