The Interrupter,ground Fault, cataloged under National Stock Number 5925-01-577-9537, is classified within Federal Supply Class 5925 (Circuit Breakers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5925-01-577-9537 |
| Primary Part Number | GFMST20 |
| Item Name | Interrupter,ground Fault |
| FSC / FSG | 5925 / 59 — Circuit Breakers |
| Manufacturer | Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division |
| Status | ACTIVE |
| Voltage in Volts and Current Type | 125.0 AC |
| 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 |
|---|---|
| GFMST20 PRIMARY | Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division (USA) |
| Reference | Meaning |
|---|---|
| 0210531 REV A FIND 33 | D/9 Drawing number reference only Niwc Pacific San Diego Navy Erp Dba Naval Information Warfare Center Pacific Div Naval Information Warfare Center Pacific |
| GFM20 | 5/9 Secondary reference Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division |
NSN 5925-01-577-9537 is a Interrupter,ground Fault, manufactured by Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division, classified under FSC 5925, Circuit Breakers. Status: active.
NSN 5925-01-577-9537 has 1 manufacturer part number on file: GFMST20 (Hubbell Incorporated (delaware) Dba Wiring Device-Kellems Division).
Key specifications for GFMST20: Voltage in Volts and Current Type: 125.0 AC; Special Features: SET STYLE IS MANUAL; DEVICE STYLE STRAIGHT BLADE; TRIP LEVEL 4-6 MA; TRIP TIME 0.025 SECONDS; FREQUENCY 60HZ; VOLTAGE RANGE 120V AC + 10%-15%; MAX HUMIDITY 0.95; OPERATING TEMP DEG F -30 TO 150 (DEG C -30 TO 66); UPC NO. 78358552100 V; Part Name Assigned by Controlling Agency: GFM20 CIRCUIT GUARD GFCI MODULE; MODULE, GFCI; End Item Identification: 0210531 (55910) ELECTRONIC ENCLOSURE UNIT. 1 specification is 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.