The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-01-020-4763, 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 Federal Commercial Item Description Promulgated by General Services Administration Washington DC. Government technical data includes 11 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through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-020-4763 |
| Primary Part Number | AA59326/5-4-A-2 |
| Item Name | Coupling Half,quick Disconnect |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| 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 |
| Connection Type | THREADED INTERNAL PIPE FIRST FLUID END CONNECTION |
| Connection Type | INTERNAL QUICK DISCONNECT ALL ENDS |
| Style Designator | MALE COUPLING HALF |
| Material Document and Classification | QQ-A-601,T6 FED SPEC 1ST MATERIAL RESPONSE AND QQ-A-601,T5 FED SPEC 2ND MATERIAL RESPONSE BODY |
| 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 |
| Part Number | Manufacturer |
|---|---|
| AA59326/5-4-A-2 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| Reference | Meaning |
|---|---|
| 6-04-039-20 | 5/1 Secondary reference Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters |
| 633D-1.25AL | 5/1 Secondary reference U.S. Government activity |
| 633D1-1-1/4AL | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 633D1-1-4ALUM | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 633D-1.25AL | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 125-D-AL | 5/1 Secondary reference Dvcc, Llc |
| A-A-59326/5C | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| 633D1-1-1/4AL | 5/1 Secondary reference U.S. Government activity |
| 633D1-1-4ALUM | 5/9 Secondary reference U.S. Government activity |
| MS27024-7 | 5/9 Secondary reference U.S. Government activity |
| 6-04-039-20 | 5/9 Secondary reference U.S. Government activity |
| A-A-59326/5 | 4/1 Identification reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
NSN 4730-01-020-4763 is a Coupling Half,quick Disconnect, manufactured by Federal Commercial Item Description Promulgated by General Services Administration Washington DC, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-020-4763 has 1 manufacturer part number on file: AA59326/5-4-A-2 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC).
Key specifications for AA59326/5-4-A-2: Surface Treatment Document and Classification: MIL-A-8625,TY 2,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY; Connection Style: PLAIN ALL ENDS; Connection Type: THREADED INTERNAL PIPE FIRST FLUID END CONNECTION; Connection Type: INTERNAL QUICK DISCONNECT ALL ENDS. 11 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.