The Base Block, cataloged under National Stock Number 5220-01-161-0508, is classified within Federal Supply Class 5220 (Inspection Gages and Precision Layout Tools) of the Measuring Tools group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5220-01-161-0508 |
| Item Name | Base Block |
| FSC / FSG | 5220 / 52 — Inspection Gages and Precision Layout Tools |
| Status | ACTIVE |
| General Characteristics Item Description | 1 IN.OR 25MM BASE BLOCK FOR USE WITH REVERSE READING BLOCK TO SET BORE GAGES MM |
| 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 |
|---|---|
| HG 525.61 | 3/9 Design control — primary reference L.s. Starrett Company, the Dba Webber Gage Div Div Webber Gage Division |
| 5220PL0935270 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5220-01-161-0508 is a Base Block, classified under FSC 5220, Inspection Gages and Precision Layout Tools. Status: active.
Key specifications for 5220-01-161-0508: General Characteristics Item Description: 1 IN.OR 25MM BASE BLOCK FOR USE WITH REVERSE READING BLOCK TO SET BORE GAGES MM; End Item Identification: F15 AND F-16. 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.