The Flange,pipe, cataloged under National Stock Number 4730-01-051-5256, 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 Caterpillar Inc Div Caterpillar Defense. Government technical data includes 17 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 | 4730-01-051-5256 |
| Primary Part Number | 1P4577 |
| Item Name | Flange,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Face Seating Surface Condition | GROUND |
| Nominal Pipe Size for Which Designed | 1.750 INCHES IN |
| Socket Depth | 0.293 INCHES NOMINAL IN |
| Flange Section Style | PLAIN FACE, SOCKET NECK |
| Style Designator | RECTANGULAR, WITH BOLT HOLES |
| Bolt Hole Diameter | 0.406 INCHES NOMINAL IN |
| Flange Length | 2.740 INCHES NOMINAL IN |
| Recess Diameter | 1.781 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 2.062 INCHES NOMINAL IN |
| Center to Center Distance Between Bolt Holes Along Width | 1.031 INCHES NOMINAL IN |
| Outside Edge to Bolt Hole Center Distance Along Length | 0.645 INCHES NOMINAL IN |
| Flange Width | 2.320 INCHES NOMINAL IN |
| Material | STEEL |
| Furnished Items | BOLT |
| Outside Edge to Bolt Hole Center Distance Along Width | 0.339 INCHES NOMINAL IN |
| Thickness | 0.696 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 |
|---|---|
| 1P4577 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 4730-01-051-5256 is a Flange,pipe, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-051-5256 has 1 manufacturer part number on file: 1P4577 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 1P4577: Face Seating Surface Condition: GROUND; Nominal Pipe Size for Which Designed: 1.750 INCHES IN; Socket Depth: 0.293 INCHES NOMINAL IN; Flange Section Style: PLAIN FACE, SOCKET NECK. 17 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.