The Flange,pipe, cataloged under National Stock Number 4730-00-020-5319, 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 Rolls-Royce Solutions America Inc. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-020-5319 |
| Primary Part Number | 5108921 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Rolls-Royce Solutions America Inc |
| Status | ACTIVE |
| Face Seating Surface Condition | UNFINISHED |
| Flange Section Style | PLAIN FACE |
| Style Designator | SQUARE, ONE BOLT HOLE CIRCLE |
| Nominal Thread Size | 4.500 INCHES IN |
| Reducer Flange Hole Type | CONCENTRIC |
| Bolt Hole Quantity | 4 |
| Bolt Circle Diameter | 4.500 INCHES NOMINAL IN |
| Screw Thread Series Designator | NPT |
| Flange Width | 5.562 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 8 |
| Material | STEEL |
| Thickness | 1.000 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 |
| Part Number | Manufacturer |
|---|---|
| 5108921 PRIMARY | Rolls-Royce Solutions America Inc (USA) |
| Reference | Meaning |
|---|---|
| 5108921 | 5/9 Secondary reference General Motors Corp |
| 5108921 | 5/9 Secondary reference General Motors Corp Rochester Products Div |
NSN 4730-00-020-5319 is a Flange,pipe, manufactured by Rolls-Royce Solutions America Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-020-5319 has 1 manufacturer part number on file: 5108921 (Rolls-Royce Solutions America Inc).
1 possible match (shared part number, not a government interchangeability claim): 5996-00-840-5246. Verify interchangeability with system specifications before substitution.
Key specifications for 5108921: Face Seating Surface Condition: UNFINISHED; Flange Section Style: PLAIN FACE; Style Designator: SQUARE, ONE BOLT HOLE CIRCLE; Nominal Thread Size: 4.500 INCHES IN. 12 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.