The Piston Assembly,fir, cataloged under National Stock Number 4210-01-166-2340, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Kidde Technologies Inc Dba Kidde Dual Spectrum Div Kidde Dual Spectrum. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Piston Assembly,fir |
| FSC / FSG | 4210 — Firefighting Equipment (FSG 42) |
| Manufacturers | Kidde Technologies Inc Dba Kidde Dual Spectrum Div Kidde Dual Spectrum (CAGE 05BU0) |
| Parameter | Value |
|---|---|
| NSN | 4210-01-166-2340 |
| Primary Part Number | 924520 |
| Item Name | Piston Assembly,fir |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Manufacturer | Kidde Technologies Inc Dba Kidde Dual Spectrum Div Kidde Dual Spectrum |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Part Number | Manufacturer |
|---|---|
| 924520 PRIMARY | Kidde Technologies Inc Dba Kidde Dual Spectrum Div Kidde Dual Spectrum (USA) |
| Reference | Meaning |
|---|---|
| 924520 | 3/9 Design control — primary reference Zero-Max, Inc |
| 10512741 | 5/1 Secondary reference General Dynamics Land Systems Canadacorp |
NSN 4210-01-166-2340 is a Piston Assembly,fir, manufactured by Kidde Technologies Inc Dba Kidde Dual Spectrum Div Kidde Dual Spectrum, classified under FSC 4210, Firefighting Equipment. Status: active.
NSN 4210-01-166-2340 has 1 manufacturer part number on file: 924520 (Kidde Technologies Inc Dba Kidde Dual Spectrum Div Kidde Dual Spectrum).
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.