The Seat,valve, cataloged under National Stock Number 4820-01-121-0884, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Portland Valve Llc. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-121-0884 |
| Primary Part Number | S-2687 ITEM 5 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Portland Valve Llc |
| Status | ACTIVE |
| Style Designator | PLAIN |
| Body Inside Diameter | 0.500 INCHES NOMINAL IN |
| Material | PLASTIC POLYTETRAFLUOROETHYLENE OVERALL |
| Seating Surface Shape | RADIAL |
| 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 |
|---|---|
| S-2687 ITEM 5 PRIMARY | Portland Valve Llc (USA) |
| 002-0621-50 PRIMARY | Portland Valve Llc (USA) |
| Reference | Meaning |
|---|---|
| S-2687 | D/9 Drawing number reference only Portland Valve Llc |
NSN 4820-01-121-0884 is a Seat,valve, manufactured by Portland Valve Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-121-0884 has 2 manufacturer part numbers on file: S-2687 ITEM 5 (Portland Valve Llc), 002-0621-50 (Portland Valve Llc).
Key specifications for S-2687 ITEM 5: Style Designator: PLAIN; Body Inside Diameter: 0.500 INCHES NOMINAL IN; Material: PLASTIC POLYTETRAFLUOROETHYLENE OVERALL; Seating Surface Shape: RADIAL. 4 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.