The Adjuster,valve Spring, cataloged under National Stock Number 4820-01-399-7523, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-399-7523 |
| Item Name | Adjuster,valve Spring |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 11878255 ITEM 5 | 5/9 Secondary reference U.S. Government activity |
| 11878249 | 3/9 Design control — primary reference U.S. Government activity |
| 11878249 | C/1 Advisory reference — outside the item-of-supply concept Fairbanks Morse, Llc |
| 11878255 ITEM 5 | C/1 Advisory reference — outside the item-of-supply concept Fairbanks Morse, Llc |
NSN 4820-01-399-7523 is a Adjuster,valve Spring, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-399-7523: Overall Height: 0.562 INCHES NOMINAL IN; Special Features: 3.625 IN. EXTERNAL THREAD IN; Material: STEEL CORROSION RESISTING. 1 specification is 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.