The Cover,synchro Receiver Mount, cataloged under National Stock Number 5990-01-149-9228, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-01-149-9228 |
| Primary Part Number | 055420-2 |
| Item Name | Cover,synchro Receiver Mount |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| Body Width | 3.486 INCHES NOMINAL IN |
| Body Height | 4.937 INCHES NOMINAL IN |
| Body Length | 8.875 INCHES NOMINAL IN |
| Mounting Configuration | FOUR 0.406 IN. DIA HOLES SPACED 1.500 IN. APART PARALLEL TO THE WIDTH AND 8.250 IN. APART PARALLEL TO THE LENGTH IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 055420-2 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| Reference | Meaning |
|---|---|
| 933F055420-2 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 5990-01-149-9228 is a Cover,synchro Receiver Mount, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-01-149-9228 has 1 manufacturer part number on file: 055420-2 (L3 Technologies, Inc. Div L3 Keo).
Key specifications for 055420-2: Body Width: 3.486 INCHES NOMINAL IN; Body Height: 4.937 INCHES NOMINAL IN; Body Length: 8.875 INCHES NOMINAL IN; Mounting Configuration: FOUR 0.406 IN. DIA HOLES SPACED 1.500 IN. APART PARALLEL TO THE WIDTH AND 8.250 IN. APART PARALLEL TO THE LENGTH 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.