The Switch,pressure, cataloged under National Stock Number 5930-01-128-3724, is classified within Federal Supply Class 5930 (Switches) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution. Government technical data includes 24 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-01-128-3724 |
| Primary Part Number | 21SN85-14 |
| Item Name | Switch,pressure |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution |
| Status | ACTIVE |
| Contact Action Stimulus | INCREASE |
| Terminal Type | CONNECTOR, RECEPTACLE |
| Mounting Facility Pattern | TWO POSITION IN-LINE |
| Overall Diameter | 1.762 INCHES NOMINAL IN |
| Proof Pressure | 4500.00 POUNDS PER SQUARE INCH GAGE LBS |
| Contact Load Current Rating | 50.0 MILLIAMPERES RESISTIVE LOAD SINGLE VOLTAGE |
| Mounting Method | UNTHREADED HOLE(S) |
| Unthreaded Mounting Hole Diameter | 0.272 INCHES NOMINAL IN |
| Sensing Element Burst Pressure | 7500.00 POUNDS PER SQUARE INCH GAGE LBS |
| Style Designator | CYLINDRICAL |
| Pressure Switch Type | GAGE |
| Distance Between Mounting Facility Centers | 1.012 INCHES NOMINAL IN |
| Nominal Thread Size | 0.217 INCHES SINGLE PRESSURE CONNECTION IN |
| Body Length | 2.100 INCHES MAXIMUM IN |
| Pressure Connector Type | PLAIN, THREADED INTERNAL SINGLE CONNECTION |
| Inside Diameter | 0.217 INCHES NOMINAL SINGLE CONNECTION IN |
| Nonpile-Up Contact Arrangement | 1 POLE, DOUBLE THROW, BOTH POSITIONS MAINTAINED |
| Media for Which Designed | GAS OR LIQUID |
| Thread Class | 2B SINGLE PRESSURE CONNECTION |
| Contact Stimulus Rating | 1800.00 ACTUATION POINT NOMINAL POUNDS PER SQUARE INCH GAGE AND 1500.00 DEACTUATION POINT NOMINAL POUNDS PER SQUARE INCH GAGE AND 300.00 DIFFERENTIAL POINT NOMINAL POUNDS PER SQUARE INCH GAGE |
| Thread Quantity Per Inch | 11 SINGLE PRESSURE CONNECTION |
| Thread Series Designator | UNS SINGLE PRESSURE CONNECTION |
| Contact Adjustability | DEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE |
| Contact Voltage Rating in Volts | 28.0 DC AT SEA LEVEL SINGLE 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 |
|---|---|
| 2771579-101 | Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations (USA) |
| 21SN85-14 PRIMARY | Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution (USA) |
| Reference | Meaning |
|---|---|
| 2771579-101 | 5/9 Secondary reference U.S. Government activity |
| 2771579-101 92003 | 5/9 Secondary reference U.S. Government activity |
| 2771579-101 | 3/2 Design control — primary reference U.S. Government activity |
| 10135338 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 5930-01-128-3724 is a Switch,pressure, manufactured by Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-128-3724 has 2 manufacturer part numbers on file: 2771579-101 (Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations), 21SN85-14 (Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution).
Key specifications for 21SN85-14: Contact Action Stimulus: INCREASE; Terminal Type: CONNECTOR, RECEPTACLE; Mounting Facility Pattern: TWO POSITION IN-LINE; Overall Diameter: 1.762 INCHES NOMINAL IN. 24 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.