The Seat,valve, cataloged under National Stock Number 4820-01-261-6596, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Walworth Company. Government technical data includes 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-261-6596 |
| Primary Part Number | 0658775 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Body Outside Diameter | 4.934 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Body Inside Diameter | 3.9375 INCHES NOMINAL IN |
| Material | STEEL SEAT |
| Seat Angle in Deg | 5.000 NOMINAL |
| Seating Surface Shape | ANGULAR |
| 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 |
|---|---|
| 0658775 PRIMARY | The Walworth Company (USA) |
| Reference | Meaning |
|---|---|
| N-10700-1 | D/9 Drawing number reference only U.S. Government activity |
| 9555-110-1-Y | 5/9 Secondary reference U.S. Government activity |
| N-10700-1 PIECE 2 5IN | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-261-6596 is a Seat,valve, manufactured by The Walworth Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-261-6596 has 1 manufacturer part number on file: 0658775 (The Walworth Company).
Key specifications for 0658775: Overall Height: 2.5755 INCHES NOMINAL IN; Body Outside Diameter: 4.934 INCHES NOMINAL IN; Style Designator: PLAIN; Body Inside Diameter: 3.9375 INCHES NOMINAL IN. 6 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.