The Caliper,micrometer,inside, cataloged under National Stock Number 5210-01-049-0388, is classified within Federal Supply Class 5210 (Measuring Tools, Craftsmen's) of the Measuring Tools group. The manufacturer of record is L.s. Starrett Company (the) Div Tool Division. Government technical data includes 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5210-01-049-0388 |
| Primary Part Number | 121C |
| Item Name | Caliper,micrometer,inside |
| FSC / FSG | 5210 / 52 — Measuring Tools, Craftsmen's |
| Manufacturer | L.s. Starrett Company (the) Div Tool Division |
| Status | ACTIVE |
| Design Type | ROD |
| Graduation Unit | THOUSANDTHS OF AN INCH |
| Gaging Range | +32.000 TO 107.000 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 |
| Part Number | Manufacturer |
|---|---|
| 121C PRIMARY | L.s. Starrett Company (the) Div Tool Division (USA) |
| Reference | Meaning |
|---|---|
| 121C | 5/9 Secondary reference L.s. Starrett Company, the Dba Webber Gage Div Div Webber Gage Division |
NSN 5210-01-049-0388 is a Caliper,micrometer,inside, manufactured by L.s. Starrett Company (the) Div Tool Division, classified under FSC 5210, Measuring Tools, Craftsmen's. Status: active.
NSN 5210-01-049-0388 has 1 manufacturer part number on file: 121C (L.s. Starrett Company (the) Div Tool Division).
1 possible match (shared part number, not a government interchangeability claim): 5975-01-714-0946. Verify interchangeability with system specifications before substitution.
Key specifications for 121C: Design Type: ROD; Graduation Unit: THOUSANDTHS OF AN INCH; Gaging Range: +32.000 TO 107.000 INCHES IN. 3 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.