The Guide,valve Stem, cataloged under National Stock Number 4820-01-356-3648, 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 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-356-3648 |
| Primary Part Number | 803-5959305-A3XX-14 |
| 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 |
| Aa End Chamfer Length | 0.060 INCHES NOMINAL IN |
| Major Diameter Length | 1.000 INCHES NOMINAL IN |
| Bb End Shank Diameter | 1.965 INCHES NOMINAL IN |
| Style Designator | PLAIN-SHOULDERED |
| Bore Counterbore | INCLUDED |
| Outside Diameter | 3.500 INCHES NOMINAL IN |
| Counterbore Depth | 3.875 INCHES NOMINAL IN |
| Counterbore Location | AA END |
| Counterbore Diameter | 1.513 INCHES NOMINAL IN |
| Length From Aa End to Largest Diameter Face | 0.250 INCHES NOMINAL IN |
| Aa End Diameter | 2.560 INCHES NOMINAL IN |
| Bb End Chamfer Angle in Deg | 45.0 |
| Bore Diameter | 1.3750 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Bore Countersink | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 803-5959305-A3XX-14 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 803-5959305 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4820-01-356-3648 is a Guide,valve Stem, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-356-3648 has 1 manufacturer part number on file: 803-5959305-A3XX-14 (Naval Sea Systems Command).
Key specifications for 803-5959305-A3XX-14: Aa End Chamfer Angle in Deg: 45.0; Aa End Chamfer Length: 0.060 INCHES NOMINAL IN; Major Diameter Length: 1.000 INCHES NOMINAL IN; Bb End Shank Diameter: 1.965 INCHES NOMINAL IN. 16 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.
NSN 4820-01-356-3648 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.