The Optical Flat Set, cataloged under National Stock Number 5210-00-213-9060, is classified within Federal Supply Class 5210 (Measuring Tools, Craftsmen's) of the Measuring Tools group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 5210-00-213-9060 |
| Item Name | Optical Flat Set |
| FSC / FSG | 5210 / 52 — Measuring Tools, Craftsmen's |
| Status | ACTIVE |
| Nondefinitive Spec/std Data | 2 CLASS AND 2 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 |
|---|---|
| 049910-273 | 5/1 Secondary reference Van Keuren |
| 157-901 | 5/9 Secondary reference James Industrial Inc |
| 25.20000 | 5/1 Secondary reference Cail Tool & Machinery, Inc. Dba Cail Tool & Machinery Inc |
| MIL026901CLASS2SET2 | 2/2 Government specification standardization U.S. Government activity |
| 25.20000 | 5/1 Secondary reference Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa |
| 157-901 | 5/1 Secondary reference Mti/mitutoyo Corp |
NSN 5210-00-213-9060 is a Optical Flat Set, classified under FSC 5210, Measuring Tools, Craftsmen's. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4310-00-919-9014, 3040-01-298-9460, 4820-01-374-2520. Verify interchangeability with system specifications before substitution.
Key specifications for 5210-00-213-9060: Nondefinitive Spec/std Data: 2 CLASS AND 2 SET; Special Features: (1) FUSED QUARTZ FLAT WK DOUBLE TYPE 0.000004 IN. FLATNESS ACCURACY 1.125 IN. DIA. EA 0.5 0.5063 0.5125 0.5188 IN. THK;W/CASE IN. 1 specification is 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.