The Head,sprinkler,fire Protection, cataloged under National Stock Number 4210-01-258-0998, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4210-01-258-0998 |
| Item Name | Head,sprinkler,fire Protection |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Status | ACTIVE |
| Opening Diameter | 0.859 INCHES NOMINAL IN |
| Head Type | SPRINKLER |
| Connection Thread Size | 2-1/2 IN.-8 IN |
| Connection Thread Series | NPT |
| Connection Thread Location | INTERNAL |
| Media for Which Designed | BROMOTRIFLUOROMETHANE |
| Material | COPPER ALLOY |
| Spray Angle Pattern | 360.0 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 |
|---|---|
| 32664-4-55 | 3/9 Design control — primary reference Grinnell Corp Grinnell Fire Protection Systmes Div |
NSN 4210-01-258-0998 is a Head,sprinkler,fire Protection, classified under FSC 4210, Firefighting Equipment. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4210-01-325-7068. Verify interchangeability with system specifications before substitution.
Key specifications for 4210-01-258-0998: Opening Diameter: 0.859 INCHES NOMINAL IN; Head Type: SPRINKLER; Connection Thread Size: 2-1/2 IN.-8 IN; Connection Thread Series: NPT. 8 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.