The Indicator,liquid Quantity, cataloged under National Stock Number 6680-01-643-8579, 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 2 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6680-01-643-8579 |
| Primary Part Number | 2641-792-03 ASSY 283D4 |
| Item Name | Indicator,liquid Quantity |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Naval Inventory Control Point Mechanicsburg |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES |
| 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 |
|---|---|
| 2641-792-03 ASSY 283D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| H5257615A-21D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| H547-0001-H5257615A-21D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 501-7066653 ASSY 283D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| H525-7615-21D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| 7383858-H5257615A-21D4 | Naval Inventory Control Point Mechanicsburg (USA) |
| Reference | Meaning |
|---|---|
| 7383858-H5257615A-21 | 5/1 Secondary reference Naval Sea Systems Command |
| 2641-792-03 ASSY 283 | 3/1 Design control — primary reference U.S. Government activity |
| 501-7066653 ASSY 283 | 5/1 Secondary reference Naval Sea Systems Command |
| H547-0001-H5257615A-21 | 5/1 Secondary reference U.S. Government activity |
| H5257615A-21 | 5/1 Secondary reference U.S. Government activity |
| H525-7615-21 | 5/1 Secondary reference U.S. Government activity |
NSN 6680-01-643-8579 is a Indicator,liquid Quantity, 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 6680-01-643-8579 has 6 manufacturer part numbers on file: 2641-792-03 ASSY 283D4 (Naval Inventory Control Point Mechanicsburg), H5257615A-21D4 (Naval Inventory Control Point Mechanicsburg), H547-0001-H5257615A-21D4 (Naval Inventory Control Point Mechanicsburg), 501-7066653 ASSY 283D4 (Naval Inventory Control Point Mechanicsburg), H525-7615-21D4 (Naval Inventory Control Point Mechanicsburg) and 1 more.
Key specifications for 2641-792-03 ASSY 283D4: Criticality Code Justification: ZZZY; Part Name Assigned by Controlling Agency: INDICATOR ASSY; Reference Number Differentiating Characteristics: MATERIAL CONTROLLED IAW SS800-AG-MAN-010/P-9290 SYSTEM CERTIFICATION PRODURES AND CRITERIA MANUAL FOR DEEP SUBMERGENCE SYSTEMS; CRITICAL ITEM FOR SAFETY AND SURVIVAL OF DEEP SUBMERGENCE RESEARCH AND RESCUE VEHICLES AS DIFFERENTIATED BY SPECIAL TEST FEATURES. 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.
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.