The Parts Kit,sight Indicator, cataloged under National Stock Number 6680-01-436-4554, 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 Clark-Reliance Llc. Government technical data includes 4 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6680-01-436-4554 |
| Primary Part Number | CMS1525 |
| Item Name | Parts Kit,sight Indicator |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Clark-Reliance Llc |
| Status | ACTIVE |
| Component Quantity | 3 |
| Document Type | MFR DRAWING |
| Accessory Identifying Number | CMS1802-PC2 PART NO. AND CMS1802-PC3 PART NO. AND CMS1802-PC5 PART NO. |
| End Item Name | INDICATOR,SIGHT |
| 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 |
|---|---|
| CMS1525 PRIMARY | Clark-Reliance Llc (USA) |
| Reference | Meaning |
|---|---|
| TBC-18-B | D/9 Drawing number reference only U.S. Government activity |
| 960-F | 5/9 Secondary reference U.S. Government activity |
NSN 6680-01-436-4554 is a Parts Kit,sight Indicator, manufactured by Clark-Reliance Llc, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-436-4554 has 1 manufacturer part number on file: CMS1525 (Clark-Reliance Llc).
1 possible match (shared part number, not a government interchangeability claim): 6680-01-646-9580. Verify interchangeability with system specifications before substitution.
Key specifications for CMS1525: Component Quantity: 3; Document Type: MFR DRAWING; Accessory Identifying Number: CMS1802-PC2 PART NO. AND CMS1802-PC3 PART NO. AND CMS1802-PC5 PART NO.; End Item Name: INDICATOR,SIGHT. 4 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.