The Trackball Assembly, cataloged under National Stock Number 5895-00-291-4873, is classified within Federal Supply Class 5895 (Miscellaneous Communication Equipment) of the Communication, Detection, and Coherent Radiation Equipment group. The manufacturer of record is Orbit International Corp. Div Orbit Instrument. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5895-00-291-4873 |
| Primary Part Number | 55751 |
| Item Name | Trackball Assembly |
| FSC / FSG | 5895 / 58 — Miscellaneous Communication Equipment |
| Manufacturer | Orbit International Corp. Div Orbit Instrument |
| Status | ACTIVE |
| FSC Application Data | CONTROL,COMPUTER-INDICATOR,DISPLAY GROUP,COMMUNICATION-IDENTIFICATION-NAVIGATION |
| General Characteristics Item Description | O/A DIM. 4.000 IN. LG,3.620 IN. W,3.140 IN. H IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Shelf Life Code | 0 |
| Criticality Code | N |
| Unit of Issue | EA |
| Acquisition advice code | VH |
| Weight | 3.0000 lbs |
| Cube | 0.4444 cu ft |
| Part Number | Manufacturer |
|---|---|
| T500-001-0001 | L3harris Interstate Electronics Corporation (USA) |
| 55751 PRIMARY | Orbit International Corp. Div Orbit Instrument (USA) |
NSN 5895-00-291-4873 is a Trackball Assembly, manufactured by Orbit International Corp. Div Orbit Instrument, classified under FSC 5895, Miscellaneous Communication Equipment. Status: active.
NSN 5895-00-291-4873 has 2 manufacturer part numbers on file: T500-001-0001 (L3harris Interstate Electronics Corporation), 55751 (Orbit International Corp. Div Orbit Instrument).
3 possible matches (shared part number, not a government interchangeability claim): 1650-00-511-1369, 2540-01-129-8697, 1730-01-134-3121. Verify interchangeability with system specifications before substitution.
Key specifications for 55751: FSC Application Data: CONTROL,COMPUTER-INDICATOR,DISPLAY GROUP,COMMUNICATION-IDENTIFICATION-NAVIGATION; General Characteristics Item Description: O/A DIM. 4.000 IN. LG,3.620 IN. W,3.140 IN. H IN. 2 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 5895-00-291-4873 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.