The Adapter,straight,pipe to Hose,fi, cataloged under National Stock Number 4210-01-261-9722, is classified within Federal Supply Class 4210 (Firefighting Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4210-01-261-9722 |
| Item Name | Adapter,straight,pipe to Hose,fi |
| FSC / FSG | 4210 / 42 — Firefighting Equipment |
| Status | ACTIVE |
| Connection Style | PLAIN (HOSE) SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Type | THREADED EXTERNAL HOSE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Nominal Thread Size | 4.000 INCHES FIRST END IN |
| Nominal Thread Size | 2.500 INCHES SECOND END IN |
| Thread Quantity Per Inch | 7-1/2 SECOND END |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | NH SECOND END |
| Thread Series Designator | NPT FIRST END |
| 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 |
|---|---|
| B208 | 3/9 Design control — primary reference Halprin Supply Co |
NSN 4210-01-261-9722 is a Adapter,straight,pipe to Hose,fi, classified under FSC 4210, Firefighting Equipment. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 3110-01-299-9057, 3120-01-317-1861, 6130-01-443-8587. Verify interchangeability with system specifications before substitution.
Key specifications for 4210-01-261-9722: Connection Style: PLAIN (HOSE) SECOND END; Connection Style: PLAIN (PIPE) FIRST END; Connection Type: THREADED EXTERNAL HOSE SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END. 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.