The Flange,pipe, cataloged under National Stock Number 4730-01-464-4973, 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 9 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-464-4973 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Nominal Pipe Size for Which Designed | 2.000 INCHES IN |
| Style Designator | BOLT HOLE CONNECTOR PLATE |
| Bolt Hole Diameter | 0.375 INCHES NOMINAL IN |
| Material Document and Classification | ASTMA-516/70 ASSN STD 1ST MATERIAL RESPONSE OR ASTMA240/316SS ASSN STD 2ND MATERIAL RESPONSE OR QQ-N-281/NICU FED SPEC 3RD MATERIAL RESPONSE |
| Outer Bolt Circle Hole Quantity | 4 |
| Bolt Hole Quantity | 4 |
| Flange Width | 8.500 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING OR NICKEL ALLOY OR STEEL |
| Inner Bolt Circle Hole Quantity | 4 |
| 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 |
|---|---|
| TZH-B61 REV 2 PIECE 2 | 5/2 Secondary reference U.S. Government activity |
| TZH-B61 | D/9 Drawing number reference only U.S. Government activity |
| TMS-8462 | 3/2 Design control — primary reference U.S. Government activity |
| TZH-18-B61-2 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4730-01-464-4973 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): 9340-01-470-0483, 6680-01-484-9105. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-464-4973: Nominal Pipe Size for Which Designed: 2.000 INCHES IN; Style Designator: BOLT HOLE CONNECTOR PLATE; Bolt Hole Diameter: 0.375 INCHES NOMINAL IN; Material Document and Classification: ASTMA-516/70 ASSN STD 1ST MATERIAL RESPONSE OR ASTMA240/316SS ASSN STD 2ND MATERIAL RESPONSE OR QQ-N-281/NICU FED SPEC 3RD MATERIAL RESPONSE. 9 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.