The Seat,valve, cataloged under National Stock Number 4820-01-152-2688, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-152-2688 |
| Item Name | Seat,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Body Outside Diameter | 9.006 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Material Document and Classification | ASTM-A105 ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Body Inside Diameter | 7.750 INCHES NOMINAL IN |
| Material | STEEL OVERALL |
| Seating Surface Shape | FLAT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 803-2177518-10XX-04 | 3/2 Design control — primary reference U.S. Government activity |
| 803-2177518 | D/9 Drawing number reference only U.S. Government activity |
| 803-2177518-10X | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-152-2688 is a Seat,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4810-01-324-9365. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-152-2688: Overall Height: 3.420 INCHES NOMINAL IN; Body Outside Diameter: 9.006 INCHES NOMINAL IN; Style Designator: PLAIN; Material Document and Classification: ASTM-A105 ASSN STD SINGLE MATERIAL RESPONSE SEAT. 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.
NSN 4820-01-152-2688 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.