The Head,sprinkler,fire Protection, cataloged under National Stock Number 4210-01-048-4525, 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 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4210-01-048-4525 |
| Primary Part Number | 52921N-360DEG-5 PLUS |
| Item Name | Head,sprinkler,fire Protection |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Manufacturer | Tyco Fire Products Lp |
| Status | ACTIVE |
| Head Type | SPRAY |
| Connection Thread Size | 1 IN.-11 1/2 IN |
| 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 |
|---|---|
| 52921-360-5 | Tyco Fire Products Lp (USA) |
| 52921N-360DEG-5 PLUS PRIMARY | Tyco Fire Products Lp (USA) |
| Reference | Meaning |
|---|---|
| 28029N | 5/9 Secondary reference Tyco Fire Products Lp |
| 52921N CODE 5 PLUS | 5/9 Secondary reference Tyco Fire Products Lp |
| 52921N | D/9 Drawing number reference only Tyco Fire Products Lp |
| 52921N-360-5 PLUS | 5/9 Secondary reference Tyco Fire Products Lp |
| 52921N | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 52921 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 4210-01-048-4525 is a Head,sprinkler,fire Protection, manufactured by Tyco Fire Products Lp, classified under FSC 4210, Firefighting Equipment. Status: active.
NSN 4210-01-048-4525 has 2 manufacturer part numbers on file: 52921-360-5 (Tyco Fire Products Lp), 52921N-360DEG-5 PLUS (Tyco Fire Products Lp).
4 possible matches (shared part number, not a government interchangeability claim): 6130-01-194-2570, 5940-01-269-1817, 2925-01-397-8028. Verify interchangeability with system specifications before substitution.
Key specifications for 52921N-360DEG-5 PLUS: Head Type: SPRAY; Connection Thread Size: 1 IN.-11 1/2 IN; 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. 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.