The Optical Flat Set, cataloged under National Stock Number 5210-00-203-4654, is classified within Federal Supply Class 5210 (Measuring Tools, Craftsmen's) of the Measuring Tools group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5210-00-203-4654 |
| Item Name | Optical Flat Set |
| FSC / FSG | 5210 / 52 — Measuring Tools, Craftsmen's |
| Status | ACTIVE |
| Departure From Cited Document | AS MOD BY MIL-O-26901 AMEND 1 |
| Nondefinitive Spec/std Data | 3 CLASS AND 7 SET |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL026901AMEND1CLASS3SET7 | 5/9 Secondary reference U.S. Government activity |
| GG-O-635A | 4/1 Identification reference U.S. Government activity |
NSN 5210-00-203-4654 is a Optical Flat Set, classified under FSC 5210, Measuring Tools, Craftsmen's. Status: active.
Key specifications for 5210-00-203-4654: Departure From Cited Document: AS MOD BY MIL-O-26901 AMEND 1; Nondefinitive Spec/std Data: 3 CLASS AND 7 SET; Special Features: FLAT 2 FUSED QUARTZ REFERENCE DOUBLE TYPE 0.000001 IN. FLATNESS ACCURACY 6 IN. DIA. 1 IN. THK;W/CASE IN. 2 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.