The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-020-7205, 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 14 specifications, cited from the U.S. Government catalog. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-020-7205 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625,TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY |
| Connection Style | PLAIN ALL ENDS |
| Mating End Identification | DOVER CORP OPW DIV COUPLING HALF,QUICK DISCONNECT,PART NO. 633-A1-1-4ALUM |
| Connection Type | INTERNAL QUICK DISCONNECT ALL ENDS |
| Connection Type | THREADED EXTERNAL PIPE FIRST FLUID END CONNECTION |
| Style Designator | MALE COUPLING HALF |
| Material Document and Classification | QQ-A-601,T6 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Quick Disconnect Nominal Size | 1.812 INCHES ALL ENDS IN |
| Leg Length | 0.922 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Nominal Thread Size | 1.250 INCHES ALL ENDS IN |
| Surface Treatment | ANODIZE BODY |
| Material | ALUMINUM ALLOY BODY |
| Quick Disconnect Method | CAM-LOCKING ALL ENDS |
| Thread Series Designator | NPT 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 |
| Reference | Meaning |
|---|---|
| 633B1-1-4ALUM | 5/9 Secondary reference U.S. Government activity |
| 633B-1.25AL | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 87371-01K | 5/1 Secondary reference U.S. Government activity |
| 125-B-AL | 5/1 Secondary reference Dvcc, Llc |
| 633B-1.25AL | 5/1 Secondary reference U.S. Government activity |
| MS27026-7 | 2/2 Government specification standardization U.S. Government activity |
| 633B-1-1/4AL | 5/1 Secondary reference U.S. Government activity |
| 633B-1-1/4AL | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 633B1-1-4ALUM | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 87371-01 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-020-7205 is a Coupling Half,quick Disconnect, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
Key specifications for 4730-01-020-7205: Surface Treatment Document and Classification: MIL-A-8625,TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY; Connection Style: PLAIN ALL ENDS; Mating End Identification: DOVER CORP OPW DIV COUPLING HALF,QUICK DISCONNECT,PART NO. 633-A1-1-4ALUM; Connection Type: INTERNAL QUICK DISCONNECT ALL ENDS. 14 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.