The Light Cup Assembly, cataloged under National Stock Number 6680-01-077-7388, is classified within Federal Supply Class 6680 (Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 6680-01-077-7388 |
| Primary Part Number | 1000637 |
| Item Name | Light Cup Assembly |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 1000637 | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited (GBR) |
| Reference | Meaning |
|---|---|
| 1000637 | 3/2 Design control — primary reference U.S. Government activity |
NSN 6680-01-077-7388 is a Light Cup Assembly, manufactured by Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-077-7388 has 1 manufacturer part number on file: 1000637 (Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited).
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-585-1737, 6110-01-598-6861, 6920-01-667-2458. Verify interchangeability with system specifications before substitution.
Key specifications for 1000637: End Item Identification: F-16 ACFT. 0 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.
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.