The Seat,valve, cataloged under National Stock Number 4820-01-135-5583, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-135-5583 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Style Designator | PLAIN THREADED |
| Body Inside Diameter | 2.447 INCHES NOMINAL IN |
| Material | COPPER ALLOY 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 |
| Reference | Meaning |
|---|---|
| B-122-0000 | D/9 Drawing number reference only Pima Valve, Llc |
| B-122E-0250 PART 6 | 3/9 Design control — primary reference Pima Valve, Llc |
| B-122E-0250 PART 6 | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| B-122D0000 PART | C/1 Advisory reference — outside the item-of-supply concept Pima Valve, Llc |
NSN 4820-01-135-5583 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-135-5583: Overall Height: 0.400 INCHES NOMINAL IN; Style Designator: PLAIN THREADED; Body Inside Diameter: 2.447 INCHES NOMINAL IN; Material: COPPER ALLOY OVERALL. 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.