The Adapter,air Conditioning-Heating, cataloged under National Stock Number 4520-01-526-5018, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4520-01-526-5018 |
| Primary Part Number | 123EC51310-7 |
| Item Name | Adapter,air Conditioning-Heating |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| FSC Application Data | COOLING AIR, FS 141-356 |
| 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 |
|---|---|
| 123EC51310-7 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 123EC51310-7 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 4520-01-526-5018 is a Adapter,air Conditioning-Heating, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-526-5018 has 1 manufacturer part number on file: 123EC51310-7 (Northrop Grumman Systems Corporation).
Key specifications for 123EC51310-7: FSC Application Data: COOLING AIR, FS 141-356; Overall Length: 3.160 INCHES NOMINAL IN; Overall Width: 1.750 INCHES NOMINAL IN; Special Features: TEE ADAPTER WITH BEADED TUBE ENDS PER MS33660. 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.