The Keying Bar,connector, cataloged under National Stock Number 5840-01-098-8734, 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 Smiths Aerospace, Inc., Electronic Systems-Grand Rapids. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5840-01-098-8734 |
| Primary Part Number | 21398-2 |
| Item Name | Keying Bar,connector |
| FSC / FSG | 5840 / 58 — Radar Equipment, Except Airborne |
| Manufacturer | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL ALUMINUM ALLOY 2024-T4; CHEMICAL FILM FINISH PER MIL-C-5541 CLASS 1A; 8.880 IN. LG; 0.620 IN. W; 0.188 IN. H A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21398-2 PRIMARY | Smiths Aerospace, Inc., Electronic Systems-Grand Rapids (USA) |
| Reference | Meaning |
|---|---|
| 21398-2D | 5/9 Secondary reference Smiths Aerospace, Inc., Electronic Systems-Grand Rapids |
NSN 5840-01-098-8734 is a Keying Bar,connector, manufactured by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids, classified under FSC 5840, Radar Equipment, Except Airborne. Status: active.
NSN 5840-01-098-8734 has 1 manufacturer part number on file: 21398-2 (Smiths Aerospace, Inc., Electronic Systems-Grand Rapids).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-359-2789. Verify interchangeability with system specifications before substitution.
Key specifications for 21398-2: General Characteristics Item Description: MATERIAL ALUMINUM ALLOY 2024-T4; CHEMICAL FILM FINISH PER MIL-C-5541 CLASS 1A; 8.880 IN. LG; 0.620 IN. W; 0.188 IN. H A. 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.
NSN 5840-01-098-8734 has DEMIL Code B. 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.