The Head,sprinkler,fire Protection, cataloged under National Stock Number 4210-01-129-8031, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4210-01-129-8031 |
| Primary Part Number | 6409T31 |
| Item Name | Head,sprinkler,fire Protection |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Head Type | SPRINKLER |
| Connection Thread Size | 0.500 IN.-14 IN |
| Connection Thread Series | NPT |
| Connection Thread Location | INTERNAL |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 6409T31 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 6409T11 | 5/9 Secondary reference Mcmaster-Carr Supply Co |
| PSN-50-904-1-165 | 5/9 Secondary reference Grinnell Corp Sub of Tyco Intl Us Inc |
| 53-111-1-165 | 3/9 Design control — primary reference Grinnell Corp Sub of Tyco Intl Us Inc |
NSN 4210-01-129-8031 is a Head,sprinkler,fire Protection, manufactured by Mcmaster-Carr Supply Co, classified under FSC 4210, Firefighting Equipment. Status: active.
NSN 4210-01-129-8031 has 1 manufacturer part number on file: 6409T31 (Mcmaster-Carr Supply Co).
1 possible match (shared part number, not a government interchangeability claim): 4210-01-212-2668. Verify interchangeability with system specifications before substitution.
Key specifications for 6409T31: Head Type: SPRINKLER; Connection Thread Size: 0.500 IN.-14 IN; Connection Thread Series: NPT; Connection Thread Location: INTERNAL. 5 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.