The Sprinkler Subassy, cataloged under National Stock Number 4210-01-522-1672, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Naval Sea Systems Command. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4210-01-522-1672 |
| Primary Part Number | 521-7549585-A1 |
| Item Name | Sprinkler Subassy |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 521-7549585-A1 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| G728-4201-A1 | 5/2 Secondary reference U.S. Government activity |
NSN 4210-01-522-1672 is a Sprinkler Subassy, manufactured by Naval Sea Systems Command, classified under FSC 4210, Firefighting Equipment. Status: active.
NSN 4210-01-522-1672 has 1 manufacturer part number on file: 521-7549585-A1 (Naval Sea Systems Command).
Key specifications for 521-7549585-A1: Overall Length: 11.900 INCHES NOMINAL IN; Overall Width: 10.750 INCHES NOMINAL IN; Special Features: 6.30 IN THK - CONSISTS OF SCREWS, NUTS, WELDMOUNT CAGE, PANEL FRAMES, PIN QUICK RELEASE, AND VALVE MANUAL CONTROL -- USE ON SSN TRIDENT CLASS - CONTROL PANELS - MAGAZINE SPRINKLER SYSTEM IN. 0 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.
NSN 4210-01-522-1672 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.