The Standoff,underwater, cataloged under National Stock Number 6605-00-877-0263, is classified within Federal Supply Class 6605 (Navigational Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rms. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Standoff,underwater |
| FSC / FSG | 6605 — Navigational Instruments (FSG 66) |
| Manufacturers | Lockheed Martin Corporation Div Rms (CAGE 03538) |
| Parameter | Value |
|---|---|
| NSN | 6605-00-877-0263 |
| Primary Part Number | A3190 |
| Item Name | Standoff,underwater |
| FSC / FSG | 6605 / 66 — Navigational Instruments |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| A3190 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| A3190 | 5/9 Secondary reference Martin Marietta Technologies Inc Sub of Martin Marietta Corp Aero and Naval Systems |
NSN 6605-00-877-0263 is a Standoff,underwater, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 6605, Navigational Instruments. Status: active.
NSN 6605-00-877-0263 has 1 manufacturer part number on file: A3190 (Lockheed Martin Corporation Div Rms).
3 possible matches (shared part number, not a government interchangeability claim): 5915-01-121-3453, 5360-01-205-4030, 4820-01-313-4546. Verify interchangeability with system specifications before substitution.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 6605-00-877-0263 has DEMIL Code Q. 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.