The Guide,valve Stem, cataloged under National Stock Number 4820-01-497-6019, 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 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 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 | 4820-01-497-6019 |
| Primary Part Number | 803-5348084-XXX-16 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Shoulder Second Fillet Radius | 0.060 INCHES NOMINAL IN |
| Major Diameter Length | 0.190 INCHES NOMINAL IN |
| Bb End Shank Diameter | 0.750 INCHES NOMINAL IN |
| Style Designator | PLAIN-SHOULDERED |
| Bore Counterbore | NOT INCLUDED |
| Outside Diameter | 1.000 INCHES NOMINAL IN |
| Aa End Radius | 0.030 INCHES NOMINAL IN |
| Length From Aa End to Largest Diameter Face | 0.500 INCHES NOMINAL IN |
| Aa End Diameter | 0.812 INCHES NOMINAL IN |
| Bb End Chamfer Angle in Deg | 45.0 |
| Bb End Radius | 0.030 INCHES NOMINAL IN |
| Bore Diameter | 0.4210 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Shoulder First Fillet Radius | 0.060 INCHES NOMINAL IN |
| Bore Countersink | NOT INCLUDED |
| 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 |
|---|---|
| 803-5348084-XXX-16 PRIMARY | Naval Sea Systems Command (USA) |
NSN 4820-01-497-6019 is a Guide,valve Stem, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-497-6019 has 1 manufacturer part number on file: 803-5348084-XXX-16 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-643-8399. Verify interchangeability with system specifications before substitution.
Key specifications for 803-5348084-XXX-16: Shoulder Second Fillet Radius: 0.060 INCHES NOMINAL IN; Major Diameter Length: 0.190 INCHES NOMINAL IN; Bb End Shank Diameter: 0.750 INCHES NOMINAL IN; Style Designator: PLAIN-SHOULDERED. 15 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.