The Head,micrometer, cataloged under National Stock Number 5210-01-186-1045, 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 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5210-01-186-1045 |
| Primary Part Number | H4-A-209 |
| Item Name | Head,micrometer |
| FSC / FSG | 5210 / 52 — Measuring Tools, Craftsmen's |
| Manufacturer | L.s. Starrett Company (the) Div Tool Division |
| Status | ACTIVE |
| Measurement System | ENGLISH |
| Ratchet Stop | INCLUDED |
| Accessory Components and Quantity | 1 ROD |
| Clamping Surface Diameter | 0.375 INCHES NOMINAL IN |
| Smallest Graduation Unit | THOUSANDTHS OF AN INCH |
| 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 |
|---|---|
| H4-A-209 PRIMARY | L.s. Starrett Company (the) Div Tool Division (USA) |
| Reference | Meaning |
|---|---|
| 1257B61H01 | 5/9 Secondary reference Westinghouse Electric Corp Power Generation-Generator Div |
| H4-4-209 | 5/9 Secondary reference L.s. Starrett Company, the Dba Webber Gage Div Div Webber Gage Division |
NSN 5210-01-186-1045 is a Head,micrometer, manufactured by L.s. Starrett Company (the) Div Tool Division, classified under FSC 5210, Measuring Tools, Craftsmen's. Status: active.
NSN 5210-01-186-1045 has 1 manufacturer part number on file: H4-A-209 (L.s. Starrett Company (the) Div Tool Division).
Key specifications for H4-A-209: Measurement System: ENGLISH; Ratchet Stop: INCLUDED; Accessory Components and Quantity: 1 ROD; Clamping Surface Diameter: 0.375 INCHES NOMINAL IN. 5 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.