The Flange,pipe,swivel Retaining, cataloged under National Stock Number 4730-01-083-4432, 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 21 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-083-4432 |
| Item Name | Flange,pipe,swivel Retaining |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Face Seating Surface Condition | GROUND |
| Nominal Pipe Size for Which Designed | 0.750 INCHES IN |
| Surface Treatment Document and Classification | QQ-P-416,CLASS 3,TYPE 2 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TYPE 2,CLASS 2 FED SPEC 2ND TREATMENT RESPONSE |
| Operating Pressure and Type | 3000.0 POUNDS PER SQUARE INCH (PSI) HYDROCARBON FUEL OR OIL MAXIMUM REQUIRED LBS |
| Flange Section Style | PLAIN RECESSED FACE |
| Style Designator | RECTANGULAR, WITH BOLT HOLES |
| Bolt Hole Diameter | 0.406 INCHES NOMINAL IN |
| Recess Depth | 0.245 INCHES NOMINAL IN |
| Flange Length | 2.562 INCHES NOMINAL IN |
| Specification/standard Data | 81349-MIL-F-52525C GOVERNMENT SPECIFICATION |
| Recess Diameter | 1.531 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 1.875 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OR ZINC |
| Center to Center Distance Between Bolt Holes Along Width | 0.891 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Length | 0.578 INCHES NOMINAL IN |
| Flange Width | 2.047 INCHES NOMINAL IN |
| Material | STEEL |
| Furnished Items | SCREW AND LOCK WASHER AND PREFORMED PACKING |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.344 INCHES NOMINAL IN |
| Thickness | 0.562 INCHES NOMINAL IN |
| 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 |
|---|---|
| M52525/17-12J | 2/2 Government specification standardization U.S. Government activity |
| M52525/17-12 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-52525/17 | 4/1 Identification reference U.S. Government activity |
| MIL-F-52525 | 5/9 Secondary reference U.S. Government activity |
NSN 4730-01-083-4432 is a Flange,pipe,swivel Retaining, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4730-01-084-3597. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-083-4432: Face Seating Surface Condition: GROUND; Nominal Pipe Size for Which Designed: 0.750 INCHES IN; Surface Treatment Document and Classification: QQ-P-416,CLASS 3,TYPE 2 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TYPE 2,CLASS 2 FED SPEC 2ND TREATMENT RESPONSE; Operating Pressure and Type: 3000.0 POUNDS PER SQUARE INCH (PSI) HYDROCARBON FUEL OR OIL MAXIMUM REQUIRED LBS. 21 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.