The Timer, cataloged under National Stock Number 6645-01-629-9657, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Summit Machine Tool Llc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 6645-01-629-9657 |
| Primary Part Number | 520200LA2D226 |
| Item Name | Timer |
| FSC / FSG | 6645 / 66 — Time Measuring Instruments |
| Manufacturer | Summit Machine Tool Llc |
| 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 |
|---|---|
| 520200LA2D226 PRIMARY | Summit Machine Tool Llc (USA) |
| Reference | Meaning |
|---|---|
| HR ELECTRIC PARTS LIST ITEM 6 | C/1 Advisory reference — outside the item-of-supply concept Summit Machine Tool Llc |
| 30HD PG 8-1 REF NO TR2 | C/1 Advisory reference — outside the item-of-supply concept Summit Machine Tool Llc |
NSN 6645-01-629-9657 is a Timer, manufactured by Summit Machine Tool Llc, classified under FSC 6645, Time Measuring Instruments. Status: active.
NSN 6645-01-629-9657 has 1 manufacturer part number on file: 520200LA2D226 (Summit Machine Tool Llc).
1 possible match (shared part number, not a government interchangeability claim): 6130-01-631-4267. Verify interchangeability with system specifications before substitution.
Key specifications for 520200LA2D226: Special Features: USED ON LATHE; Part Name Assigned by Controlling Agency: TIMER; End Item Identification: LATHE MODEL 3. 0 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.