The Indicator,sight,liquid, cataloged under National Stock Number 6680-01-237-9655, 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 Naval Inventory Control Point Mechanicsburg. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6680-01-237-9655 |
| Primary Part Number | M-35SVM |
| Item Name | Indicator,sight,liquid |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Reference Number Differentiating Characteristics | EQUIPMENT AND/OR PARTS REQUIRING SPECIAL MATERIAL CONTROL AND QUALITY ASSURANCE WHICH SUPPORT THE NON-MAGNETIC SIGNATURE OF MINESWEEPERS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | S |
| Part Number | Manufacturer |
|---|---|
| M-35SVM | Naval Inventory Control Point Mechanicsburg (USA) |
| S-523 ITEM 123VM | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| M-35S | 3/1 Design control — primary reference U.S. Government activity |
| S-523 ITEM 123 | 5/9 Secondary reference Metso Minerals Industries, Inc. Dba Bulk Material Handling |
| M-35SVM | 5/2 Secondary reference U.S. Government activity |
NSN 6680-01-237-9655 is a Indicator,sight,liquid, manufactured by Naval Inventory Control Point Mechanicsburg, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-01-237-9655 has 2 manufacturer part numbers on file: M-35SVM (Naval Inventory Control Point Mechanicsburg), S-523 ITEM 123VM (Naval Inventory Control Point Mechanicsburg).
1 possible match (shared part number, not a government interchangeability claim): 6675-01-439-6509. Verify interchangeability with system specifications before substitution.
Key specifications for M-35SVM: Reference Number Differentiating Characteristics: EQUIPMENT AND/OR PARTS REQUIRING SPECIAL MATERIAL CONTROL AND QUALITY ASSURANCE WHICH SUPPORT THE NON-MAGNETIC SIGNATURE OF MINESWEEPERS. 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.
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.