The Guide,valve Stem, cataloged under National Stock Number 4820-01-497-6975, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-497-6975 |
| Primary Part Number | 803-5348084-4XX-25 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Aa End Chamfer Angle in Deg | 45.0 |
| Style Designator | PLAIN |
| Bore Counterbore | NOT INCLUDED |
| Outside Diameter | 1.9722 INCHES MINIMUM AND 1.9772 INCHES MAXIMUM IN |
| Bb End Chamfer Angle in Deg | 45.0 |
| Bore Diameter | 1.0190 INCHES NOMINAL IN |
| Material | STEEL |
| 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-25 | Naval Sea Systems Command (USA) |
| 803-5348084-4XX-25 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-5348084 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-497-6975 is a Guide,valve Stem, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-497-6975 has 2 manufacturer part numbers on file: 803-5348084-XXX-25 (Naval Sea Systems Command), 803-5348084-4XX-25 (Naval Sea Systems Command).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-644-7361, 4730-01-713-8974, 5310-01-714-3864. Verify interchangeability with system specifications before substitution.
Key specifications for 803-5348084-4XX-25: Aa End Chamfer Angle in Deg: 45.0; Style Designator: PLAIN; Overall Length: 1.560 INCHES NOMINAL IN; Bore Counterbore: NOT INCLUDED. 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.