The Switch,rotary, cataloged under National Stock Number 5930-01-171-5543, is classified within Federal Supply Class 5930 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Helle Engineering Inc. Government technical data includes 27 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-01-171-5543 |
| Primary Part Number | 21991 |
| Item Name | Switch,rotary |
| FSC / FSG | 5930 / 59 — No Item Name Available |
| Manufacturer | Helle Engineering Inc |
| Status | ACTIVE |
| Precious Material and Location | CONTACT AND ROTOR BLADE SURFACES SILVER |
| Style Designator | CIRCULAR WAFER, BUSHING MOUNT |
| Switch Actuator Positioning Increment | 30.0 DEGREES SINGLE ACTUATOR |
| Nonturn Device Radius | 0.531 INCHES NOMINAL AT 6:00 OCLOCK IN |
| Switch Contact Basic Design | NONPILE-UP SYMMETRICAL |
| Contact Voltage Rating in Volts | 28.0 HIGHEST DC VOLTAGE RATING AT SEA LEVEL |
| Pole Quantity | 4 SINGLE SECTION REAR |
| Mounting Method | THREADED BUSHING SINGLE MOUNTING FACILITY |
| Shaft Type | ROUND, FLATTED SINGLE ACTUATOR |
| Nominal Thread Size | 0.375 INCHES SINGLE MOUNTING FACILITY IN |
| Throw Quantity | 2 SINGLE SECTION REAR |
| Terminal Type | TAB, SOLDER LUG |
| Contact Load Current Rating | 350.0 MILLIAMPERES RESISTIVE LOAD AC AT SEA LEVEL |
| Shaft Diameter | 0.250 INCHES NOMINAL SINGLE ACTUATOR IN |
| Shaft Length | 0.500 INCHES NOMINAL SINGLE ACTUATOR IN |
| Contact Voltage Rating in Volts | 6.0 LOWEST DC VOLTAGE RATING AT SEA LEVEL |
| Switch Actuator Momentary Position | CLOCKWISE SINGLE ACTUATOR |
| Switch Actuator Indexing Position Quantity | 2 SINGLE ACTUATOR |
| Thread Length | 0.375 INCHES NOMINAL SINGLE MOUNTING FACILITY IN |
| Nonturn Device Type | TAB AT 6:00 OCLOCK |
| Thread Class | 2A SINGLE MOUNTING FACILITY A |
| Individual Section Quantity | 1 |
| First Flat Length | 0.281 INCHES MINIMUM AND 0.312 INCHES MAXIMUM SINGLE ACTUATOR IN |
| Flat Height | 0.200 INCHES NOMINAL SINGLE ACTUATOR IN |
| Contact Voltage Rating in Volts | 115.0 AC AT SEA LEVEL |
| Thread Series Designator | UNEF SINGLE MOUNTING FACILITY |
| Contact Load Current Rating | 5.5 AMPERES RESISTIVE LOAD LOWEST DC VOLTAGE RATING AT SEA LEVEL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 21991 | Helle Engineering Inc (USA) |
NSN 5930-01-171-5543 is a Switch,rotary, manufactured by Helle Engineering Inc, classified under FSC 5930 (No Item Name Available). Status: active.
NSN 5930-01-171-5543 has 1 cross-referenced part number: 21991 (Helle Engineering Inc).
There are 4 known substitutes for 5930-01-171-5543: 5365-00-033-2530, 4320-00-334-4146, 5998-01-087-7799 and 1 more. Verify interchangeability with system specifications before substitution.
Key specifications for 21991: Precious Material and Location: CONTACT AND ROTOR BLADE SURFACES SILVER; Style Designator: CIRCULAR WAFER, BUSHING MOUNT; Switch Actuator Positioning Increment: 30.0 DEGREES SINGLE ACTUATOR; Nonturn Device Radius: 0.531 INCHES NOMINAL AT 6:00 OCLOCK IN. 30 total characteristics are documented in the Federal Logistics Information System.