The Elbow,flange, cataloged under National Stock Number 4730-01-346-1708, 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 Naval Inventory Control Point Mechanicsburg. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-346-1708 |
| Primary Part Number | 2621-166-03 ITEM 63APL1 |
| Item Name | Elbow,flange |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES SECOND END |
| Nominal Pipe Size Accommodated | 2.000 INCHES FIRST END IN |
| Flange Face Design | PLAIN WITH GASKET GROOVE SECOND END |
| Connection Style | SOCKET (PIPE) FIRST END |
| Bolt Circle Nominal Diameter | 4.438 INCHES SECOND END IN |
| Criticality Code Justification | ZZZY |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | FLANGE SECOND END |
| Material Document and Classification | MIL-C-20159 TY 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Bolt Hole Nominal Diameter | 0.688 INCHES SECOND END IN |
| Operating Pressure | 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Nominal Outside Diameter | 5.560 INCHES SECOND END IN |
| Bolt Hole Quantity | 6 SECOND END |
| Media for Which Designed | WATER SINGLE RESPONSE |
| Material | COPPER ALLOY OVERALL |
| Reference Number Differentiating Characteristics | QUALITY CONTROL IAW NAVSHIPS 0948-045-7010 MATERIAL IDENTIFICATION AND CONTROL INSTRUCTION FOR LEVEL 1 ITEMS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| 2621-166-03 ITEM 63APL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| 4687601-63APL1 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 2621-166-03 ITEM 63AP | 5/1 Secondary reference U.S. Government activity |
| 4687601-63AP | 3/1 Design control — primary reference U.S. Government activity |
NSN 4730-01-346-1708 is a Elbow,flange, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-346-1708 has 2 manufacturer part numbers on file: 2621-166-03 ITEM 63APL1 (Naval Inventory Control Point Mechanicsburg), 4687601-63APL1 (Naval Inventory Control Point Mechanicsburg).
Key specifications for 2621-166-03 ITEM 63APL1: Flange Shape: ROUND WITH HOLES SECOND END; Nominal Pipe Size Accommodated: 2.000 INCHES FIRST END IN; Flange Face Design: PLAIN WITH GASKET GROOVE SECOND END; Connection Style: SOCKET (PIPE) FIRST END. 16 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.