The Seat,valve, cataloged under National Stock Number 4820-00-243-9580, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-243-9580 |
| Primary Part Number | 5R0718 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.203 INCHES NOMINAL IN |
| Flange Diameter | 2.562 INCHES NOMINAL IN |
| Body Outside Diameter | 1.875 INCHES NOMINAL IN |
| Style Designator | PLAIN FLANGED |
| Body Inside Diameter | 0.750 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Under Flange Height | 1.062 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seating Surface Shape | FLAT |
| 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 |
|---|---|
| 5R0718 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 5R718 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
NSN 4820-00-243-9580 is a Seat,valve, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-243-9580 has 1 manufacturer part number on file: 5R0718 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 5R0718: Flange Seat to Disk End Height: 0.203 INCHES NOMINAL IN; Flange Diameter: 2.562 INCHES NOMINAL IN; Body Outside Diameter: 1.875 INCHES NOMINAL IN; Style Designator: PLAIN FLANGED. 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.