The Collar,spacing, cataloged under National Stock Number 5840-00-355-8817, is classified within Federal Supply Class 5840 (Radar Equipment, Except Airborne) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Collar,spacing |
| FSC / FSG | 5840 — Radar Equipment, Except Airborne (FSG 58) |
| Manufacturers | Lockheed Martin Corporation Div Rms - Mitchel Field (CAGE 56232) |
| Parameter | Value |
|---|---|
| NSN | 5840-00-355-8817 |
| Primary Part Number | 311880 |
| Item Name | Collar,spacing |
| FSC / FSG | 5840 / 58 — Radar Equipment, Except Airborne |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 311880 | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
| Reference | Meaning |
|---|---|
| SMB152335 | 3/2 Design control — primary reference U.S. Government activity |
| 311880 | C/1 Advisory reference — outside the item-of-supply concept Eaton Aerospace, Llc Dba Jackson South |
NSN 5840-00-355-8817 is a Collar,spacing, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5840, Radar Equipment, Except Airborne. Status: active.
NSN 5840-00-355-8817 has 1 manufacturer part number on file: 311880 (Lockheed Martin Corporation Div Rms - Mitchel Field).
1 possible match (shared part number, not a government interchangeability claim): 5950-01-080-3703. Verify interchangeability with system specifications before substitution.
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.