The Switch,toggle, cataloged under National Stock Number 5930-00-027-2303, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Sef Power. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-00-027-2303 |
| Primary Part Number | 21AT3 |
| Item Name | Switch,toggle |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Sef Power |
| Status | ACTIVE |
| Bushing Length | 0.343 INCHES NOMINAL IN |
| Actuator Diameter | 0.125 INCHES NOMINAL IN |
| Inclosure Type | UNINCLOSED |
| Actuator Position-Locking Relationship | UP POSITION NO LOCKING ACTION AND DOWN POSITION NO LOCKING ACTION AND CENTER POSITION LOCKED IN |
| Body Style | BUSHING MOUNT |
| Actuator Style | ROUND |
| Mounting Method | THREADED BUSHING |
| Body Width | 0.695 INCHES NOMINAL IN |
| Body Height | 1.300 INCHES NOMINAL IN |
| Nominal Thread Size | 0.469 INCHES IN |
| Actuator Position-Action Relationship | UP POSITION MOMENTARY AND DOWN POSITION MOMENTARY AND CENTER POSITION MAINTAINED |
| Body Length | 1.800 INCHES NOMINAL IN |
| Nonpile-Up Contact Arrangement | 2 POLE, DOUBLE THROW, TWO POSITIONS MOMENTARY SINGLE SWITCH UNIT |
| Maximum Voltage Rating in Volts | 250.0 AC AND 30.0 DC |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Terminal Type and Quantity | 12 WIRE LEAD |
| Thread Series Designator | UNS |
| Actuator Height | 0.781 INCHES NOMINAL IN |
| Contact Load Current Rating at Maximum Rated Voltage | 5.000 AMPERES RESISTIVE DC |
| Hazardous Locations/environmental Protection | EXPLOSION PROOF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21AT3 | Sef Power (FRA) |
| Reference | Meaning |
|---|---|
| 21AT3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5930-00-027-2303 is a Switch,toggle, manufactured by Sef Power, classified under FSC 5930, Switches. Status: active.
NSN 5930-00-027-2303 has 1 manufacturer part number on file: 21AT3 (Sef Power).
Key specifications for 21AT3: Bushing Length: 0.343 INCHES NOMINAL IN; Actuator Diameter: 0.125 INCHES NOMINAL IN; Inclosure Type: UNINCLOSED; Actuator Position-Locking Relationship: UP POSITION NO LOCKING ACTION AND DOWN POSITION NO LOCKING ACTION AND CENTER POSITION LOCKED IN. 21 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.