The Meter,time Totalizing, cataloged under National Stock Number 6645-01-244-0232, is classified within Federal Supply Class 6645 (Time 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 23 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6645-01-244-0232 |
| Primary Part Number | K19603-JO |
| Item Name | Meter,time Totalizing |
| FSC / FSG | 6645 / 66 — Time Measuring Instruments |
| Manufacturer | Ai-Tek Instruments Llc Dba Ai-Tek Instruments Llc |
| Status | ACTIVE |
| Electrical Movement Type | SYNCHRONOUS MOTOR |
| Indicator Type | DRUM REGISTER |
| Terminal Quantity | 2 |
| Background Color | BLACK BACKGROUND ON HR WHEELS |
| Movement Type | ELECTRICAL |
| Current Type | AC |
| Terminal Type | SOLDER HOOK |
| Mounting Method | SEMIFLUSH |
| Body Width | 0.500 INCHES NOMINAL IN |
| Smallest Increment Indicated | 1.00 |
| Operating Frequency | 60.0 HERTZ NOMINAL |
| Marking Color | WHITE NUMERALS FOR HRS |
| Maximum Measurement | 9999.00 |
| Hermetic Protection | PROVIDED |
| Body Length | 0.500 INCHES NOMINAL IN |
| Unit Type | MOUNTED |
| Reset Feature | NOT PROVIDED |
| Mounting Configuration | 0.750 IN.-32 UN THREADED MTG IN |
| Mounting Flange Diameter | 1.250 INCHES NOMINAL IN |
| Body Depth | 1.171 INCHES MINIMUM AND 1.221 INCHES MAXIMUM IN |
| Mounting Type | PANEL |
| Voltage Rating | 115.0 VOLTS NOMINAL |
| Measurement Unit | HOURS |
| 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 |
|---|---|
| 5408488 | Naval Sea Systems Command (USA) |
| K19603-JO PRIMARY | Ai-Tek Instruments Llc Dba Ai-Tek Instruments Llc (USA) |
| Reference | Meaning |
|---|---|
| B19601 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| K19603-JO | 5/9 Secondary reference U.S. Government activity |
NSN 6645-01-244-0232 is a Meter,time Totalizing, manufactured by Ai-Tek Instruments Llc Dba Ai-Tek Instruments Llc, classified under FSC 6645, Time Measuring Instruments. Status: active.
NSN 6645-01-244-0232 has 2 manufacturer part numbers on file: 5408488 (Naval Sea Systems Command), K19603-JO (Ai-Tek Instruments Llc Dba Ai-Tek Instruments Llc).
Key specifications for K19603-JO: Electrical Movement Type: SYNCHRONOUS MOTOR; Indicator Type: DRUM REGISTER; Terminal Quantity: 2; Background Color: BLACK BACKGROUND ON HR WHEELS. 23 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.