The Gage,plug,thread, cataloged under National Stock Number 5220-00-751-4021, is classified within Federal Supply Class 5220 (Inspection Gages and Precision Layout Tools) of the Measuring Tools group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5220-00-751-4021 |
| Item Name | Gage,plug,thread |
| FSC / FSG | 5220 / 52 — Inspection Gages and Precision Layout Tools |
| Status | ACTIVE |
| Screw Thread Quantity Per Inch | 28.0 |
| Thread Design Pitch Diameter | 0.2268 INCHES NOMINAL IN |
| Design Type | SINGLE END |
| Thread Type | SINGLE |
| Tapered Threads | NOT INCLUDED |
| Nominal Thread Diameter | 0.2500 INCHES IN |
| Features Provided | GO GAGE |
| Thread Major Diameter Truncation Feature | NOT INCLUDED |
| Thread Direction | RIGHT-HAND |
| Thread Stamped Pitch Diameter | 0.2268 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNF |
| Pitch Diameter Tolerance | -0.00000 TO 0.00300 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 |
|---|---|
| MILSTD114C | 4/1 Identification reference U.S. Government activity |
NSN 5220-00-751-4021 is a Gage,plug,thread, classified under FSC 5220, Inspection Gages and Precision Layout Tools. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5220-00-751-4173. Verify interchangeability with system specifications before substitution.
Key specifications for 5220-00-751-4021: Screw Thread Quantity Per Inch: 28.0; Thread Design Pitch Diameter: 0.2268 INCHES NOMINAL IN; Design Type: SINGLE END; Thread Type: SINGLE. 12 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.