The Counter,electrical, cataloged under National Stock Number 6680-00-151-5387, 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 Ai-Tek Instruments Llc Dba Ai-Tek Instruments Llc. Government technical data includes 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6680-00-151-5387 |
| Primary Part Number | A4742 |
| Item Name | Counter,electrical |
| FSC / FSG | 6680 / 66 — Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments |
| Manufacturer | Ai-Tek Instruments Llc Dba Ai-Tek Instruments Llc |
| Status | ACTIVE |
| Numeral Display Method | DRUM |
| Register Quantity | 1 |
| Mounting Facility Type and Quantity | 4 THREADED HOLE(S) |
| Mounting Arrangement Style | FOUR POSITION SQUARE/RECTANGLE |
| Register Function | SUBTRACT SINGLE REGISTER SINGLE TIER |
| Voltage in Volts and Current Type | 29.0 DC |
| Figure Quantity Per Register | 2 SINGLE REGISTER SINGLE TIER |
| Style Designator | ELECTRICAL CASED |
| Longest Vertical Distance Between Mounting Centers | 0.850 INCHES NOMINAL IN |
| Numeral Readout | 00 MINIMUM AND 99 MAXIMUM SINGLE REGISTER SINGLE TIER |
| Figure Height | 0.187 INCHES NOMINAL SINGLE REGISTER SINGLE TIER IN |
| Color | BLACK SINGLE REGISTER SINGLE TIER FIGURE BACKGROUND |
| Color | WHITE SINGLE REGISTER SINGLE TIER FIGURE |
| Mounting Type for Which Designed | PANEL REAR SINGLE REGISTER SINGLE TIER |
| Terminal Type and Quantity | 3 WIRE LEAD |
| Longest Horizontal Distance Between Mounting Centers | 0.920 INCHES NOMINAL IN |
| 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 |
|---|---|
| A4742 PRIMARY | Ai-Tek Instruments Llc Dba Ai-Tek Instruments Llc (USA) |
| Reference | Meaning |
|---|---|
| 218-21599-2 | 7/2 Vendor item drawing reference U.S. Government activity |
| A4742 | 5/9 Secondary reference U.S. Government activity |
NSN 6680-00-151-5387 is a Counter,electrical, manufactured by Ai-Tek Instruments Llc Dba Ai-Tek Instruments Llc, classified under FSC 6680, Liquid and Gas Flow, Liquid Level, and Mechanical Motion Measuring Instruments. Status: active.
NSN 6680-00-151-5387 has 1 manufacturer part number on file: A4742 (Ai-Tek Instruments Llc Dba Ai-Tek Instruments Llc).
1 possible match (shared part number, not a government interchangeability claim): 6530-01-616-5670. Verify interchangeability with system specifications before substitution.
Key specifications for A4742: Numeral Display Method: DRUM; Register Quantity: 1; Mounting Facility Type and Quantity: 4 THREADED HOLE(S); Overall Height: 1.170 INCHES NOMINAL IN. 16 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.