The Head,sprinkler,fire Protection, cataloged under National Stock Number 4210-01-281-8020, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Tyco Fire Products Lp. Government technical data includes 10 specifications, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4210-01-281-8020 |
| Primary Part Number | 52921-360-29 |
| Item Name | Head,sprinkler,fire Protection |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Manufacturer | Tyco Fire Products Lp |
| Status | ACTIVE |
| Opening Diameter | 0.469 INCHES NOMINAL IN |
| Head Type | SPRAY |
| Connection Thread Size | 1 IN.-11-1/2 IN |
| Opening Quantity | 4 |
| Connection Thread Series | NPT |
| Special Test Features | SHOCK TEST GR-A,CLASS 1,TY-A,MEDIUM WEIGHT MIL-S-901; VIBRATION TEST TY-1 MIL-STD-167/1; SALT SPRAY TEST,METHOD 509-MIL-STD-810 |
| Connection Thread Location | EXTERNAL |
| Media for Which Designed | BROMOTRIFLUOROMETHANE |
| Material | STEEL CORROSION RESISTING |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 52921-360-29 | Tyco Fire Products Lp (USA) |
| Reference | Meaning |
|---|---|
| 52921N | D/9 Drawing number reference only Tyco Fire Products Lp |
| 52921N-360DEGREE-29 | 5/9 Secondary reference Tyco Fire Products Lp |
| 52921N-360DEGREE-29 | 3/9 Design control — primary reference Grinnell Corp Grinnell Fire Protection Systmes Div |
NSN 4210-01-281-8020 is a Head,sprinkler,fire Protection, manufactured by Tyco Fire Products Lp, classified under FSC 4210, Firefighting Equipment. Status: active.
NSN 4210-01-281-8020 has 1 manufacturer part number on file: 52921-360-29 (Tyco Fire Products Lp).
Key specifications for 52921-360-29: Opening Diameter: 0.469 INCHES NOMINAL IN; Head Type: SPRAY; Connection Thread Size: 1 IN.-11-1/2 IN; Opening Quantity: 4. 10 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.