The Seeker,target,radar, cataloged under National Stock Number 1420-01-271-7765, is classified within Federal Supply Class 1420 (Guided Missile Components) of the Guided Missiles group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 1420-01-271-7765 |
| Primary Part Number | 1657AS0528-1 |
| Item Name | Seeker,target,radar |
| FSC / FSG | 1420 / 14 — Guided Missile Components |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Model Number | OY-53/DSQ-28 |
| General Characteristics Item Description | HARPOON,GRAY,C/O RADOME ASSEMBLY 1657AS0534-1 CW-1170/DSQ-28,RECEIVER TRANSMITTER 642AS2501-2,24.00 IN. LG,13.50 IN. DIA.,MK648-0 S-S CNTR,EMPTY CNTR WT. 69.00 LBS LBS |
| Package Nominal Overall Diameter | 23.81 INCHES IN |
| Package Nominal Overall Length and Type | 37.48 INCHES SHIPPING CONTAINER IN |
| Unable to Decode | UNABLE TO DECODE |
| Gross Weight | 159.0 SHIPPING CONTAINER POUNDS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL P — Demil Prior To Sale/Transfer |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| 1657AS0528-1 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| AS2414 | 7/1 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| OY-53/DSQ-28GRAY | 5/1 Secondary reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 1420-01-271-7765 is a Seeker,target,radar, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 1420, Guided Missile Components. Status: active.
NSN 1420-01-271-7765 has 1 manufacturer part number on file: 1657AS0528-1 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
1 possible match (shared part number, not a government interchangeability claim): 1420-01-292-9215. Verify interchangeability with system specifications before substitution.
Key specifications for 1657AS0528-1: Model Number: OY-53/DSQ-28; General Characteristics Item Description: HARPOON,GRAY,C/O RADOME ASSEMBLY 1657AS0534-1 CW-1170/DSQ-28,RECEIVER TRANSMITTER 642AS2501-2,24.00 IN. LG,13.50 IN. DIA.,MK648-0 S-S CNTR,EMPTY CNTR WT. 69.00 LBS LBS; Package Nominal Overall Diameter: 23.81 INCHES IN; Package Nominal Overall Length and Type: 37.48 INCHES SHIPPING CONTAINER IN. 6 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.
NSN 1420-01-271-7765 has DEMIL Code P. Demilitarization may be required before disposal or transfer to non-military entities.
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.