The Timer,sequential, cataloged under National Stock Number 6645-01-561-5930, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Evac North America Inc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Timer,sequential |
| FSC / FSG | 6645 — Time Measuring Instruments (FSG 66) |
| Manufacturers | Evac North America Inc (CAGE 47WD8) |
| Parameter | Value |
|---|---|
| NSN | 6645-01-561-5930 |
| Primary Part Number | 5500391 |
| Item Name | Timer,sequential |
| FSC / FSG | 6645 / 66 — Time Measuring Instruments |
| Manufacturer | Evac North America Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 5500391 PRIMARY | Evac North America Inc (USA) |
| 5900075 ITEM NO 2 | Evac North America Inc (USA) |
| Reference | Meaning |
|---|---|
| 5500391 | 5/9 Secondary reference Envirovac Inc Dba Monogram Systems-Rockford Div |
| 5900075 ITEM NO 2 | 5/9 Secondary reference Envirovac Inc Dba Monogram Systems-Rockford Div |
| 5900075 | D/9 Drawing number reference only Envirovac Inc Dba Monogram Systems-Rockford Div |
NSN 6645-01-561-5930 is a Timer,sequential, manufactured by Evac North America Inc, classified under FSC 6645, Time Measuring Instruments. Status: active.
NSN 6645-01-561-5930 has 2 manufacturer part numbers on file: 5500391 (Evac North America Inc), 5900075 ITEM NO 2 (Evac North America Inc).
3 possible matches (shared part number, not a government interchangeability claim): 5940-01-561-5932, 5930-01-561-5937, 5330-01-561-5939. Verify interchangeability with system specifications before substitution.
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.