The Switch,thermostatic, cataloged under National Stock Number 5930-01-043-5891, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Crown Coachworks Inc Div Crown Coachworks Auto Body & Paint. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-01-043-5891 |
| Primary Part Number | A28AA-4 |
| Item Name | Switch,thermostatic |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Crown Coachworks Inc Div Crown Coachworks Auto Body & Paint |
| Status | ACTIVE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | SCREW |
| Mounting Facility Pattern | FOUR POSITION RECTANGULAR |
| Contact Load Current Rating | 16.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE |
| Contact Load Current Rating | 8.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE |
| Mounting Method | UNTHREADED HOLE(S) |
| Contact Adjustment Range | +30.00 TO 110.00 ACTUATION POINT DEGREES FAHRENHEIT AND +26.00 TO 106.00 DEACTUATION POINT DEGREES FAHRENHEIT |
| Unthreaded Mounting Hole Diameter | 0.280 INCHES NOMINAL IN |
| Longest Vertical Distance Between Mounting Centers | 2.938 INCHES NOMINAL IN |
| Temp Sensing Element Type | INTERNAL SENSOR |
| Contact Adjustment Type | EXTERNAL DEACTUATION POINT DIAL AND EXTERNAL ACTUATION POINT DIAL |
| Body Length | 4.391 INCHES NOMINAL IN |
| Operating Temp Rating | -30.0 FAHRENHEIT MINIMUM AND 140.0 FAHRENHEIT MAXIMUM DEGF |
| Nonpile-Up Contact Arrangement | 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY |
| Media for Which Designed | GAS OR LIQUID |
| Contact Adjustability | DEACTUATION POINT ADJUSTABLE AND ACTUATION POINT ADJUSTABLE |
| Contact Voltage Rating in Volts | 240.0 AC AT SEA LEVEL SECOND VOLTAGE |
| Contact Voltage Rating in Volts | 120.0 AC AT SEA LEVEL FIRST VOLTAGE |
| Longest Horizontal Distance Between Mounting Centers | 1.562 INCHES NOMINAL IN |
| 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 |
|---|---|
| A28AA-4 | Crown Coachworks Inc Div Crown Coachworks Auto Body & Paint (USA) |
| Reference | Meaning |
|---|---|
| A28AA-4C | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| A28AA-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5930-01-043-5891 is a Switch,thermostatic, manufactured by Crown Coachworks Inc Div Crown Coachworks Auto Body & Paint, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-043-5891 has 1 manufacturer part number on file: A28AA-4 (Crown Coachworks Inc Div Crown Coachworks Auto Body & Paint).
Key specifications for A28AA-4: Overall Height: 2.250 INCHES NOMINAL IN; Contact Action Stimulus: INCREASE; Terminal Type: SCREW; Mounting Facility Pattern: FOUR POSITION RECTANGULAR. 19 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.