The Head,micrometer, cataloged under National Stock Number 5210-01-021-0412, is classified within Federal Supply Class 5210 (Measuring Tools, Craftsmen's) of the Measuring Tools group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5210-01-021-0412 |
| Item Name | Head,micrometer |
| FSC / FSG | 5210 / 52 — Measuring Tools, Craftsmen's |
| Status | ACTIVE |
| Spindle Projection Length at Zero Micrometer Setting | 0.680 INCHES NOMINAL IN |
| Measurement System | ENGLISH |
| Plated Finish | INCLUDED |
| Stainless Steel Material | INCLUDED |
| Ratchet Stop | NOT INCLUDED |
| Locking Device | NOT INCLUDED |
| Smallest Graduation Unit | TEN-THOUSANDTHS OF AN INCH |
| Material | CHROMIUM PLATING |
| Measurement Range | +0.000 TO 0.500 INCHES IN |
| 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 |
|---|---|
| 148-501 | 3/9 Design control — primary reference Mitutoyo |
| 148-501 | C/1 Advisory reference — outside the item-of-supply concept Mitutoyo Corporation |
NSN 5210-01-021-0412 is a Head,micrometer, classified under FSC 5210, Measuring Tools, Craftsmen's. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 6640-01-360-5835, 5985-01-692-9820. Verify interchangeability with system specifications before substitution.
Key specifications for 5210-01-021-0412: Spindle Projection Length at Zero Micrometer Setting: 0.680 INCHES NOMINAL IN; Measurement System: ENGLISH; Plated Finish: INCLUDED; Stainless Steel Material: INCLUDED. 9 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.