The Optical Flat, cataloged under National Stock Number 5210-01-364-3358, is classified within Federal Supply Class 5210 (Measuring Tools, Craftsmen's) of the Measuring Tools group. The manufacturer of record is Van Keuren. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5210-01-364-3358 |
| Primary Part Number | 3200858 |
| Item Name | Optical Flat |
| FSC / FSG | 5210 / 52 — Measuring Tools, Craftsmen's |
| Manufacturer | Van Keuren |
| Status | ACTIVE |
| Design Type | REFERENCE SINGLE |
| Diameter | 6.000 INCHES NOMINAL IN |
| Working Surface Flatness Accuracy | 0.00000125 INCHES NOMINAL IN |
| Material | QUARTZ |
| Thickness | 1.000 INCHES NOMINAL IN |
| Case | PROVIDED |
| 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 |
|---|---|
| 3200858 PRIMARY | Van Keuren (USA) |
| Reference | Meaning |
|---|---|
| 24-10-6X1SSREF | 5/9 Secondary reference Van Keuren |
NSN 5210-01-364-3358 is a Optical Flat, manufactured by Van Keuren, classified under FSC 5210, Measuring Tools, Craftsmen's. Status: active.
NSN 5210-01-364-3358 has 1 manufacturer part number on file: 3200858 (Van Keuren).
Key specifications for 3200858: Design Type: REFERENCE SINGLE; Diameter: 6.000 INCHES NOMINAL IN; Working Surface Flatness Accuracy: 0.00000125 INCHES NOMINAL IN; Material: QUARTZ. 6 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.