The Test Plug,aircraft Component, cataloged under National Stock Number 4920-01-185-0788, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4920-01-185-0788 |
| Primary Part Number | MC90397 |
| Item Name | Test Plug,aircraft Component |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| General Characteristics Item Description | MATL: ALUMINUM,ANODIZE FINISH; ENVELOPE DIMENSIONS: 2.500 IN. L,1.125 IN. DIA IN |
| Functional Description | PROVIDES CAPABILITY TO BLOCK ALL OPEN RELIEF VALVE PASSAGES IN THE GUN DRIVE UNIT HYDRAULIC MOTOR DURING PRESSURE TESTING |
| 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 |
|---|---|
| MC90397 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
| Reference | Meaning |
|---|---|
| MC90397 | 5/9 Secondary reference Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace |
NSN 4920-01-185-0788 is a Test Plug,aircraft Component, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-185-0788 has 1 manufacturer part number on file: MC90397 (Eaton Aerospace, Llc Dba Jackson South).
Key specifications for MC90397: General Characteristics Item Description: MATL: ALUMINUM,ANODIZE FINISH; ENVELOPE DIMENSIONS: 2.500 IN. L,1.125 IN. DIA IN; Special Features: COMPANY ITEM NAME-TEST PLUG, DRIVE UNIT; Functional Description: PROVIDES CAPABILITY TO BLOCK ALL OPEN RELIEF VALVE PASSAGES IN THE GUN DRIVE UNIT HYDRAULIC MOTOR DURING PRESSURE TESTING; End Item Identification: F15 ACFT. 2 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.