The Flange,pipe, cataloged under National Stock Number 4730-00-247-3490, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 27 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-247-3490 |
| Primary Part Number | 1656307 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Face Seating Surface Condition | MACHINED |
| Surface Treatment Document and Classification | MIL-P-8585 MIL SPEC SINGLE TREATMENT RESPONSE |
| Boss Bevel Angle | 15.0 DEGREES NOMINAL |
| Flange Section Style | PLAIN FACE, BEVELED RAISED NECK |
| Style Designator | RECTANGULAR, WITH BOLT HOLES |
| Bolt Hole Diameter | 0.234 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN |
| Neck Height | 0.250 INCHES NOMINAL IN |
| Bevel Depth | 0.100 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-A-225/6,ALLOY 2024,T4 FED SPEC SINGLE MATERIAL RESPONSE |
| Groove Depth | 0.055 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Flange Length | 2.000 INCHES NOMINAL IN |
| Nominal Thread Size | 0.875 INCHES IN |
| Reducer Flange Hole Type | ECCENTRIC |
| Groove Pitch Diameter | 1.100 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 1.593 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNF |
| Surface Treatment | CHROMATE ZINC |
| Center to Center Distance Between Bolt Holes Along Width | 1.375 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Length | 0.203 INCHES NOMINAL IN |
| Flange Width | 1.875 INCHES NOMINAL IN |
| Thread Class | 3B |
| Material | ALUMINUM ALLOY |
| Neck Diameter | 1.250 INCHES NOMINAL IN |
| Groove Width | 0.130 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.250 INCHES NOMINAL IN |
| Thickness | 0.250 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 |
|---|---|
| 1656307 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 4730-00-247-3490 is a Flange,pipe, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-247-3490 has 1 manufacturer part number on file: 1656307 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 1656307: Face Seating Surface Condition: MACHINED; Surface Treatment Document and Classification: MIL-P-8585 MIL SPEC SINGLE TREATMENT RESPONSE; Boss Bevel Angle: 15.0 DEGREES NOMINAL; Flange Section Style: PLAIN FACE, BEVELED RAISED NECK. 27 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.