The Guide,valve Stem, cataloged under National Stock Number 4820-00-550-6563, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Army, United States Department of the Dba Rock Island Arsenal Jmtc. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-550-6563 |
| Primary Part Number | 5506563 |
| Item Name | Guide,valve Stem |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Army, United States Department of the Dba Rock Island Arsenal Jmtc |
| Status | ACTIVE |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| Major Diameter Length | 0.700 INCHES NOMINAL IN |
| Bb End Shank Diameter | 0.875 INCHES NOMINAL IN |
| Style Designator | SHOULDERED W/FLATS SHANK END |
| Material Document and Classification | AISI 1045 ASSN STD 1ST MATERIAL RESPONSE |
| Bore Counterbore | INCLUDED |
| Outside Diameter | 1.030 INCHES NOMINAL IN |
| Flats Length | 0.625 INCHES NOMINAL IN |
| Counterbore Depth | 0.437 INCHES NOMINAL IN |
| Counterbore Location | AA END |
| Counterbore Diameter | 1.275 INCHES NOMINAL IN |
| Bore Diameter | 0.5620 INCHES NOMINAL IN |
| Material | STEEL COMP 1045 |
| Metallic Hardness Rating | 16.0 MINIMUM ROCKWELL C AND 27.0 MAXIMUM ROCKWELL C |
| 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 |
|---|---|
| 5506563 PRIMARY | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
NSN 4820-00-550-6563 is a Guide,valve Stem, manufactured by Army, United States Department of the Dba Rock Island Arsenal Jmtc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-550-6563 has 1 manufacturer part number on file: 5506563 (Army, United States Department of the Dba Rock Island Arsenal Jmtc).
Key specifications for 5506563: Width Across Flats: 0.750 INCHES NOMINAL IN; Major Diameter Length: 0.700 INCHES NOMINAL IN; Bb End Shank Diameter: 0.875 INCHES NOMINAL IN; Style Designator: SHOULDERED W/FLATS SHANK END. 14 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.