The Switch,pressure, cataloged under National Stock Number 5930-01-337-5063, 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 16 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5930-01-337-5063 |
| Primary Part Number | 21C1-1-9 |
| Item Name | Switch,pressure |
| FSC / FSG | 5930 / 59 — Switches |
| Manufacturer | Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution |
| Status | ACTIVE |
| Width Across Flats | 0.688 INCHES NOMINAL IN |
| Contact Action Stimulus | INCREASE |
| Terminal Type | CONNECTOR, RECEPTACLE |
| Overall Diameter | 1.120 INCHES NOMINAL IN |
| Proof Pressure | 311.00 POUNDS PER SQUARE INCH GAGE LBS |
| Contact Load Current Rating | 2.0 AMPERES RESISTIVE LOAD SINGLE VOLTAGE |
| Style Designator | CYLINDRICAL |
| Outside Diameter | 0.438 INCHES NOMINAL SINGLE CONNECTION IN |
| Pressure Switch Type | DIFFERENTIAL |
| Pressure Connector Type | DOUBLE THREADED SECTION BOSS FITTING GASKET WITH LOCKNUT SEALING, THREADED EXTERNAL SINGLE CONNECTION |
| Operating Temp Rating | -65.0 FAHRENHEIT MINIMUM AND 325.0 FAHRENHEIT MAXIMUM DEGF |
| Nonpile-Up Contact Arrangement | 1 POLE, SINGLE THROW, BOTH POSITIONS MAINTAINED |
| Media for Which Designed | GAS |
| Contact Stimulus Rating | 43.50 ACTUATION POINT NOMINAL POUNDS PER SQUARE INCH GAGE AND 38.00 DEACTUATION POINT NOMINAL POUNDS PER SQUARE INCH GAGE |
| Contact Adjustability | ACTUATION POINT NOT ADJUSTABLE AND DEACTUATION 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 |
|---|---|
| 21C1-1-9 PRIMARY | Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution (USA) |
| 2335-127-17 PRIMARY | Spectrum Associates, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 10135393 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74B838001-117 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5930-01-337-5063 is a Switch,pressure, manufactured by Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution, classified under FSC 5930, Switches. Status: active.
NSN 5930-01-337-5063 has 2 manufacturer part numbers on file: 21C1-1-9 (Eaton Aerospace Llc Dba Eaton Inoac Div Fluid & Electrical Distribution), 2335-127-17 (Spectrum Associates, Inc.).
Key specifications for 21C1-1-9: Width Across Flats: 0.688 INCHES NOMINAL IN; Contact Action Stimulus: INCREASE; Terminal Type: CONNECTOR, RECEPTACLE; Overall Diameter: 1.120 INCHES NOMINAL IN. 16 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.