The Coupling,switch, cataloged under National Stock Number 2040-01-033-6662, is classified within Federal Supply Class 2040 (Marine Hardware and Hull Items) of the Ship and Marine Equipment group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2040-01-033-6662 |
| Primary Part Number | 051812 |
| Item Name | Coupling,switch |
| FSC / FSG | 2040 / 20 — Marine Hardware and Hull Items |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| General Characteristics Item Description | CRES QQ-S-764; PASSIVATE; 0.438 IN. W; 0.875 IN. OD IN |
| 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 |
|---|---|
| 051812 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| 887F050071 ITEM 34 | L3 Technologies, Inc. Div L3 Keo (USA) |
| Reference | Meaning |
|---|---|
| 887B051812 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| 887B051812 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 2040-01-033-6662 is a Coupling,switch, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 2040, Marine Hardware and Hull Items. Status: active.
NSN 2040-01-033-6662 has 2 manufacturer part numbers on file: 051812 (L3 Technologies, Inc. Div L3 Keo), 887F050071 ITEM 34 (L3 Technologies, Inc. Div L3 Keo).
1 possible match (shared part number, not a government interchangeability claim): 6550-01-534-4595. Verify interchangeability with system specifications before substitution.
Key specifications for 051812: General Characteristics Item Description: CRES QQ-S-764; PASSIVATE; 0.438 IN. W; 0.875 IN. OD IN. 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.