The Flange,pipe, cataloged under National Stock Number 4730-01-485-7644, 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 Main Manufacturing Products Inc. Government technical data includes 15 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 | 4730-01-485-7644 |
| Primary Part Number | 1173-20-20 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Main Manufacturing Products Inc |
| Status | ACTIVE |
| Face Seating Surface Condition | MACHINED |
| Nominal Pipe Size for Which Designed | 1.250 INCHES IN |
| Flange Section Style | PLAIN FACE |
| Style Designator | RECTANGULAR, WITH BOLT HOLES |
| Bolt Hole Diameter | 0.470 INCHES NOMINAL IN |
| Unthreaded Reducer Hole Diameter | 1.250 INCHES NOMINAL IN |
| Flange Length | 3.190 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 2.312 INCHES NOMINAL IN |
| Center to Center Distance Between Bolt Holes Along Width | 1.188 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Length | 0.656 INCHES NOMINAL IN |
| Flange Width | 2.500 INCHES NOMINAL IN |
| Material | STEEL |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.439 INCHES NOMINAL IN |
| Thickness | 1.500 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 |
|---|---|
| 1173-20-20 PRIMARY | Main Manufacturing Products Inc (USA) |
NSN 4730-01-485-7644 is a Flange,pipe, manufactured by Main Manufacturing Products Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-485-7644 has 1 manufacturer part number on file: 1173-20-20 (Main Manufacturing Products Inc).
Key specifications for 1173-20-20: Face Seating Surface Condition: MACHINED; Nominal Pipe Size for Which Designed: 1.250 INCHES IN; Flange Section Style: PLAIN FACE; Style Designator: RECTANGULAR, WITH BOLT HOLES. 15 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.