The Timer, cataloged under National Stock Number 6645-01-031-6401, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6645-01-031-6401 |
| Item Name | Timer |
| FSC / FSG | 6645 / 66 — Time Measuring Instruments |
| Status | ACTIVE |
| General Characteristics Item Description | 115 VOLTS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| DL2550 | 5/9 Secondary reference Siemens Energy and Automation Inc Siemens Furnas Controls Div |
| TU44131 | 5/9 Secondary reference Cissell Manufacturing Company Dba Cissell Mfg |
| D12550-03 | 5/9 Secondary reference Siemens Energy and Automation Inc Siemens Furnas Controls Div |
| K572 | 3/9 Design control — primary reference Cissell Manufacturing Company Dba Cissell Mfg |
| D1550003 | 5/9 Secondary reference Siemens Energy and Automation Inc Siemens Furnas Controls Div |
NSN 6645-01-031-6401 is a Timer, classified under FSC 6645, Time Measuring Instruments. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5120-01-361-9660. Verify interchangeability with system specifications before substitution.
Key specifications for 6645-01-031-6401: General Characteristics Item Description: 115 VOLTS. 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.