The Gage,plug,plain Cylindrical, cataloged under National Stock Number 5220-01-292-9785, is classified within Federal Supply Class 5220 (Inspection Gages and Precision Layout Tools) of the Measuring Tools group. The manufacturer of record is M & H Engineering Co., Inc. Dba M & H Engineering Co Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5220-01-292-9785 |
| Primary Part Number | 21C621-134 |
| Item Name | Gage,plug,plain Cylindrical |
| FSC / FSG | 5220 / 52 — Inspection Gages and Precision Layout Tools |
| Manufacturer | M & H Engineering Co., Inc. Dba M & H Engineering Co Inc |
| Status | ACTIVE |
| Air Groove Feature | INCLUDED |
| Design Type | DOUBLE END |
| Criticality Code Justification | BSDY |
| Features Provided | NOT GO GAGE |
| Gaging Member Outside Diameter | 0.0370 INCHES IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 21C621-134 PRIMARY | M & H Engineering Co., Inc. Dba M & H Engineering Co Inc (USA) |
| Reference | Meaning |
|---|---|
| 21C621-134 | 5/9 Secondary reference General Electric Company |
| 21C621 | D/9 Drawing number reference only U.S. Government activity |
NSN 5220-01-292-9785 is a Gage,plug,plain Cylindrical, manufactured by M & H Engineering Co., Inc. Dba M & H Engineering Co Inc, classified under FSC 5220, Inspection Gages and Precision Layout Tools. Status: active.
NSN 5220-01-292-9785 has 1 manufacturer part number on file: 21C621-134 (M & H Engineering Co., Inc. Dba M & H Engineering Co Inc).
1 possible match (shared part number, not a government interchangeability claim): 5220-01-303-9533. Verify interchangeability with system specifications before substitution.
Key specifications for 21C621-134: Air Groove Feature: INCLUDED; Design Type: DOUBLE END; Criticality Code Justification: BSDY; Features Provided: NOT GO GAGE. 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.