The Coupling Assembly,quick Disconne, cataloged under National Stock Number 4730-00-204-0751, 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 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-204-0751 |
| Item Name | Coupling Assembly,quick Disconne |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.250 INCHES ALL ENDS IN |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST FLUID END CONNECTION IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Connection Style | PLAIN FIRST FLUID END CONNECTION |
| Connection Type | THREADED INTERNAL PIPE FIRST FLUID END CONNECTION |
| Connection Type | THREADED EXTERNAL PIPE SECOND FLUID END CONNECTION |
| Style Designator | COUPLING ASSEMBLY |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | SELF-SEALING |
| Nominal Thread Size | 0.250 INCHES FIRST FLUID END CONNECTION IN |
| Nominal Thread Size | 0.250 INCHES SECOND FLUID END CONNECTION IN |
| Specification/standard Data | 81349-MIL-C-4109 GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | 1 TYPE AND A CLASS AND 1 STYLE AND 2 TYPE |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Quick Disconnect Method | SPRING PUSH-PULL ALL ENDS |
| Thread Series Designator | NPT SECOND FLUID END CONNECTION |
| Thread Series Designator | NPT FIRST FLUID END CONNECTION |
| 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 |
|---|---|
| MILC4109 | 4/1 Identification reference U.S. Government activity |
NSN 4730-00-204-0751 is a Coupling Assembly,quick Disconne, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-00-204-0751: Nominal Pipe Size Accommodated: 0.250 INCHES ALL ENDS IN; Nominal Pipe Size Accommodated: 0.250 INCHES FIRST FLUID END CONNECTION IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Connection Style: PLAIN FIRST FLUID END CONNECTION. 18 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.