The Head,sprinkler,fire Protection, cataloged under National Stock Number 4210-01-690-1978, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4210-01-690-1978 |
| Item Name | Head,sprinkler,fire Protection |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Status | ACTIVE |
| Opening Diameter | 0.250 INCHES NOMINAL IN |
| Head Type | SPRAY |
| Connection Thread Size | 0.500 |
| Opening Quantity | 1 |
| Connection Thread Series | NPT |
| Connection Thread Location | EXTERNAL |
| Media for Which Designed | WATER |
| Material | COPPER ALLOY |
| Spray Angle Pattern | 180.0 DEGREES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 49-318-1-180 | 3/9 Design control — primary reference Tyco Fire Products Limited Partnership Dba Tyco Fire Suppression & Building Products Div Tyco Fire Products, Lp |
NSN 4210-01-690-1978 is a Head,sprinkler,fire Protection, classified under FSC 4210, Firefighting Equipment. Status: active.
Key specifications for 4210-01-690-1978: Opening Diameter: 0.250 INCHES NOMINAL IN; Head Type: SPRAY; Connection Thread Size: 0.500; Opening Quantity: 1. 9 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.