The Flange,pipe, cataloged under National Stock Number 4730-01-303-2497, 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 13 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-303-2497 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Diameter | 19.980 INCHES NOMINAL IN |
| Face Seating Surface Condition | MACHINED |
| Nominal Pipe Size for Which Designed | 10.000 INCHES IN |
| Maximum Operating Temp and Media for Which Designed | 150.0 FAHRENHEIT WATER, SALT DEGF |
| Operating Pressure and Type | 700.0 POUNDS PER SQUARE INCH (PSI) SALT WATER MAXIMUM REQUIRED LOCATION NOT OTHERWISE SPECIFIED LBS |
| Flange Section Style | PLAIN FACE, RAISED NECK |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.812 INCHES NOMINAL IN |
| Neck Height | 5.000 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE OR MIL-C-18726 MIL SPEC SINGLE MATERIAL RESPONSE |
| Bolt Hole Quantity | 17 |
| Bolt Circle Diameter | 10.750 INCHES NOMINAL IN |
| Material | NICKEL ALLOY OR COPPER ALLOY |
| 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 |
|---|---|
| 810-1385861 TYP | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 810-1385861 | D/9 Drawing number reference only U.S. Government activity |
| 13-08-0536BM | 5/2 Secondary reference U.S. Government activity |
| 810-1385861TYP10INMOD | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-303-2497 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-309-8150, 4730-01-318-8466, 4220-01-343-3447. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-303-2497: Flange Diameter: 19.980 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Nominal Pipe Size for Which Designed: 10.000 INCHES IN; Maximum Operating Temp and Media for Which Designed: 150.0 FAHRENHEIT WATER, SALT DEGF. 13 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.