The Parts Kit,check Valve, cataloged under National Stock Number 4820-01-042-3190, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-042-3190 |
| Item Name | Parts Kit,check Valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Component Quantity | 7 |
| Supply Items and Quantities | 99657 4400181-2200 O-RING 1; 99657 4400181-2120 O-RING 1; 99657 4400181-0230 O-RING 1; 99657 188036-0030 SEAT SUPPORT 1; 99657 188031-0030 RETAINER SPRING 1; 99657 108241-0408 WASHER 1; 99657 234443 POPPET ASSY 1 |
| 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 |
|---|---|
| 234445 | 3/2 Design control — primary reference U.S. Government activity |
| SHIPALT SSN1964 | 5/9 Secondary reference Naval Inventory Control Point Mechanicsburg |
| 234445 PC1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4820-01-042-3190 is a Parts Kit,check Valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4810-01-176-2126. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-042-3190: Component Quantity: 7; Supply Items and Quantities: 99657 4400181-2200 O-RING 1; 99657 4400181-2120 O-RING 1; 99657 4400181-0230 O-RING 1; 99657 188036-0030 SEAT SUPPORT 1; 99657 188031-0030 RETAINER SPRING 1; 99657 108241-0408 WASHER 1; 99657 234443 POPPET ASSY 1. 2 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.