The Meter,flow Rate Indicating, cataloged under National Stock Number 6680-01-680-3635, 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 Howell Laboratories Inc Dba Howell Laboratories Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 6680-01-680-3635 |
| Primary Part Number | 5650C-G502 |
| Item Name | Meter,flow Rate Indicating |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Howell Laboratories Inc Dba Howell Laboratories Inc |
| 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 |
|---|---|
| 5650C-G502 PRIMARY | Howell Laboratories Inc Dba Howell Laboratories Inc (USA) |
| Reference | Meaning |
|---|---|
| 5642 ITEM NO 14 | C/1 Advisory reference — outside the item-of-supply concept Howell Laboratories Inc Dba Howell Laboratories Inc |
| 5642 REV K | D/9 Drawing number reference only Howell Laboratories Inc Dba Howell Laboratories Inc |
NSN 6680-01-680-3635 is a Meter,flow Rate Indicating, manufactured by Howell Laboratories Inc Dba Howell Laboratories Inc, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-680-3635 has 1 manufacturer part number on file: 5650C-G502 (Howell Laboratories Inc Dba Howell Laboratories Inc).
1 possible match (shared part number, not a government interchangeability claim): 6685-01-680-3704. Verify interchangeability with system specifications before substitution.
Key specifications for 5650C-G502: Part Name Assigned by Controlling Agency: FLOWMETER; End Item Identification: PANEL, AIR CT. 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.