The Guide,valve Stem, cataloged under National Stock Number 4820-01-414-7976, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-414-7976 |
| Primary Part Number | 845-6556484 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Aa End Chamfer Angle in Deg | 30.0 |
| Bb End Shank Diameter | 2.999 INCHES NOMINAL IN |
| Style Designator | SHOULDERED W/FLATS SHANK END |
| Outside Diameter | 3.344 INCHES NOMINAL IN |
| Flats Length | 1.000 INCHES NOMINAL IN |
| Bb End Chamfer Angle in Deg | 30.0 |
| Bore Diameter | 2.1300 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 6603141 ITEM NO. 35 | Naval Sea Systems Command (USA) |
| 845-6556484 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4820-01-414-7976 is a Guide,valve Stem, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-414-7976 has 2 manufacturer part numbers on file: 6603141 ITEM NO. 35 (Naval Sea Systems Command), 845-6556484 (Naval Sea Systems Command).
Key specifications for 845-6556484: Aa End Chamfer Angle in Deg: 30.0; Bb End Shank Diameter: 2.999 INCHES NOMINAL IN; Style Designator: SHOULDERED W/FLATS SHANK END; Overall Length: 14.840 INCHES NOMINAL IN. 8 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.