The Switch,pressure, cataloged under National Stock Number 5930-01-177-8905, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Unicontrol Inc Hays Cleveland Div. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-01-177-8905 |
| Primary Part Number | DFSL-CO |
| Item Name | Switch,pressure |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Unicontrol Inc Hays Cleveland Div |
| Status | ACTIVE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | SCREW |
| Contact Load Current Rating | 10.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE |
| Contact Load Current Rating | 10.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE |
| Mounting Method | THREADED BUSHING |
| Pressure Switch Type | DIFFERENTIAL |
| Features Provided | ELECTRICAL ACCESS PORT |
| Nominal Thread Size | 0.125 INCHES SECOND PRESSURE CONNECTION IN |
| Nominal Thread Size | 0.250 INCHES FIRST PRESSURE CONNECTION IN |
| Nominal Thread Size | 1.000 INCHES SINGLE THREADED BUSHING IN |
| Operating Temp Rating | 0.0 FAHRENHEIT MINIMUM AND 180.0 FAHRENHEIT MAXIMUM DEGF |
| Nonpile-Up Contact Arrangement | 1 POLE, DOUBLE THROW, ONE POSITION MOMENTARY |
| Contact Stimulus Rating | 0.20 ACTUATION POINT NOMINAL INCHES OF WATER |
| Thread Quantity Per Inch | 14 SINGLE THREADED BUSHING |
| Thread Quantity Per Inch | 18 FIRST PRESSURE CONNECTION |
| Thread Quantity Per Inch | 27 SECOND PRESSURE CONNECTION |
| Thread Series Designator | NPT ALL PRESSURE CONNECTION |
| Thread Series Designator | UNS SINGLE THREADED BUSHING |
| Contact Adjustability | ACTUATION POINT NOT ADJUSTABLE |
| Contact Voltage Rating in Volts | 115.0 AC AT SEA LEVEL FIRST VOLTAGE |
| Contact Voltage Rating in Volts | 230.0 AC AT SEA LEVEL SECOND VOLTAGE |
| 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 |
|---|---|
| DFSL-CO | Unicontrol Inc Hays Cleveland Div (USA) |
| Reference | Meaning |
|---|---|
| 836-366 | 3/9 Design control — primary reference Aqua-Chem Inc Industrial Combustion Div |
| DFSL-CO | 5/9 Secondary reference Cleveland Controls Inc Div of Unicontrol Inc |
NSN 5930-01-177-8905 is a Switch,pressure, manufactured by Unicontrol Inc Hays Cleveland Div, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-177-8905 has 1 manufacturer part number on file: DFSL-CO (Unicontrol Inc Hays Cleveland Div).
Key specifications for DFSL-CO: Overall Height: 3.374 INCHES NOMINAL IN; Contact Action Stimulus: INCREASE; Terminal Type: SCREW; Contact Load Current Rating: 10.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE. 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.