The Caliper,micrometer,tube, cataloged under National Stock Number 5210-00-221-1931, 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 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5210-00-221-1931 |
| Primary Part Number | 576XR |
| Item Name | Caliper,micrometer,tube |
| FSC / FSG | 5210 / 52 — Measuring Tools, Craftsmen's |
| Manufacturer | L.s. Starrett Company (the) Div Tool Division |
| Status | ACTIVE |
| Graduation Unit | THOUSANDTHS OF AN INCH |
| Locknut | NOT INCLUDED |
| Ratchet Stop | INCLUDED |
| Gaging Range | +0.000 TO 0.500 INCHES IN |
| Pushbutton Pressure Control | NOT INCLUDED |
| 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 |
|---|---|
| 52604 | L.s. Starrett Company (the) Div Tool Division (USA) |
| 576XR PRIMARY | L.s. Starrett Company (the) Div Tool Division (USA) |
| Reference | Meaning |
|---|---|
| GGG-C-105 TY1CL2STC | 5/9 Secondary reference U.S. Government activity |
| GGG-C-105 | 5/9 Secondary reference U.S. Government activity |
| 576R | 5/9 Secondary reference L.s. Starrett Company (the) Div Tool Division |
NSN 5210-00-221-1931 is a Caliper,micrometer,tube, manufactured by L.s. Starrett Company (the) Div Tool Division, classified under FSC 5210, Measuring Tools, Craftsmen's. Status: active.
NSN 5210-00-221-1931 has 2 manufacturer part numbers on file: 52604 (L.s. Starrett Company (the) Div Tool Division), 576XR (L.s. Starrett Company (the) Div Tool Division).
3 possible matches (shared part number, not a government interchangeability claim): 5210-00-293-1683, 5310-00-682-5993, 5985-01-033-7114. Verify interchangeability with system specifications before substitution.
Key specifications for 576XR: Graduation Unit: THOUSANDTHS OF AN INCH; Locknut: NOT INCLUDED; Ratchet Stop: INCLUDED; Gaging Range: +0.000 TO 0.500 INCHES 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.