The Flange,pipe, cataloged under National Stock Number 4730-01-309-8151, 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13 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-309-8151 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Diameter | 9.250 INCHES NOMINAL IN |
| Face Seating Surface Condition | MACHINED |
| Nominal Pipe Size for Which Designed | 0.500 INCHES IN |
| Flange Section Style | RAISED FACE, WELDING NECK |
| Style Designator | ROUND, ONE BOLT HOLE CIRCLE |
| Bolt Hole Diameter | 0.562 INCHES NOMINAL IN |
| Neck Height | 2.375 INCHES NOMINAL IN |
| Bolt Hole Quantity | 8 |
| Bolt Circle Diameter | 8.188 INCHES NOMINAL IN |
| Raised Face Diameter | 6.984 INCHES MINIMUM AND 7.016 INCHES MAXIMUM IN |
| Raised Face Height | 0.015 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN |
| Material | COPPER ALLOY AND NICKEL ALLOY |
| Thickness | 1.375 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 |
|---|---|
| 704-4685262 ITEM F18 | 3/2 Design control — primary reference U.S. Government activity |
| 704-4685262 ITE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 845-4687676 PIECE 41 | 5/2 Secondary reference U.S. Government activity |
| 2621-228-02 PIECE 41 | 5/2 Secondary reference U.S. Government activity |
| 704-4685262 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-309-8151 is a Flange,pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-320-1640, 5930-01-374-8328. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-309-8151: Flange Diameter: 9.250 INCHES NOMINAL IN; Face Seating Surface Condition: MACHINED; Nominal Pipe Size for Which Designed: 0.500 INCHES IN; Flange Section Style: RAISED FACE, WELDING NECK. 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.