The Switch,lock,ignition, cataloged under National Stock Number 2920-00-459-6742, is classified within Federal Supply Class 2920 (Engine Electrical System Components, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Cole Hersee Company. Government technical data includes 9 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. 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 | 2920-00-459-6742 |
| Primary Part Number | M704 |
| Item Name | Switch,lock,ignition |
| FSC / FSG | 2920 / 29 — Engine Electrical System Components, Nonaircraft |
| Manufacturer | Cole Hersee Company |
| Status | ACTIVE |
| Bushing Length | 1.660 INCHES NOMINAL IN |
| Body Diameter | 1.450 INCHES NOMINAL IN |
| Inclosure Type | FULLY INCLOSED |
| Body Style | BUSHING MOUNTED |
| Nominal Thread Size | 0.438 INCHES IN |
| Body Length | 1.170 INCHES NOMINAL IN |
| Thread Quantity Per Inch | 24 |
| Terminal Type and Quantity | 4 SCREW |
| Thread Series Designator | UNS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 2920-00-459-6742 is a Switch,lock,ignition, manufactured by Cole Hersee Company, classified under FSC 2920, Engine Electrical System Components, Nonaircraft. Status: active.
NSN 2920-00-459-6742 has 2 manufacturer part numbers on file: H99B (Schramm, Inc.), M704 (Cole Hersee Company).
1 possible match (shared part number, not a government interchangeability claim): 6545-01-449-5575. Verify interchangeability with system specifications before substitution.
Key specifications for M704: Bushing Length: 1.660 INCHES NOMINAL IN; Body Diameter: 1.450 INCHES NOMINAL IN; Inclosure Type: FULLY INCLOSED; Body Style: BUSHING MOUNTED. 9 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.