The Coupling Half,quick Disconnect, cataloged under National Stock Number 4730-00-079-2451, 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 10 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through both NSN and commercial part number lookups. 15 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-079-2451 |
| Primary Part Number | AA59326/5-2-B-1 |
| 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 |
| Connection Style | PLAIN ALL ENDS |
| Style Designator | MALE COUPLING HALF |
| Material Document and Classification | QQ-C-390 ALLOY 865 FED SPEC ALL MATERIAL RESPONSES OR QQ-B-626 FED SPEC ALL MATERIAL RESPONSES BODY |
| Quick Disconnect Nominal Size | 1.250 INCHES ALL ENDS IN |
| Leg Length | 0.562 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.750 INCHES ALL ENDS IN |
| Specification/standard Data | 96906-MS27024 GOVERNMENT STANDARD |
| Material | COPPER 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 |
|---|---|
| AA59326/5-2-B-1 | Federal Commercial Item Description Promulgated by General Services Administration Washington DC (USA) |
| Reference | Meaning |
|---|---|
| 633D | D/9 Drawing number reference only U.S. Government activity |
| 633D-.75BR | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| A-A-59326/5A | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| 633D-3/4BR | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 633D-.75BR | 5/1 Secondary reference U.S. Government activity |
| 633D-.750BR | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 633D-3/4BR | 5/1 Secondary reference U.S. Government activity |
| AA59326/5A-2-B-1 | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| 633-D-3/4IN-BR | 5/9 Secondary reference U.S. Government activity |
| AA59326V12 | 5/9 Secondary reference Federal Commercial Item Description Promulgated by General Services Administration Washington DC |
| MS27024-4 | 5/9 Secondary reference U.S. Government activity |
| 633-D-3/4IN-BR | 5/9 Secondary reference Dover Resources Inc Dba Opw Engineered Systems |
| 633D-.750BR | 5/1 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 |
| 75-D-BR | 5/1 Secondary reference Dvcc, Llc |
NSN 4730-00-079-2451 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 4730-00-079-2451 has 1 manufacturer part number on file: AA59326/5-2-B-1 (Federal Commercial Item Description Promulgated by General Services Administration Washington DC).
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-135-2988, 4730-01-143-1421, 4730-01-225-6908. Verify interchangeability with system specifications before substitution.
Key specifications for AA59326/5-2-B-1: Connection Style: PLAIN ALL ENDS; Style Designator: MALE COUPLING HALF; Material Document and Classification: QQ-C-390 ALLOY 865 FED SPEC ALL MATERIAL RESPONSES OR QQ-B-626 FED SPEC ALL MATERIAL RESPONSES BODY; Overall Length: 2.125 INCHES NOMINAL IN. 10 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.