The Respirator,air Filtering, cataloged under National Stock Number 4240-01-250-2271, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. The manufacturer of record is Square D Co Monroe Plant. Government technical data includes 12 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4240-01-250-2271 |
| Primary Part Number | R9722A |
| Item Name | Respirator,air Filtering |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Square D Co Monroe Plant |
| Status | ACTIVE |
| Mask Filter Quantity | 1 |
| Filter Type | CARTRIDGE |
| Mask Type | MOUTH |
| Material Type | NONELASTIC |
| Criticality Code Justification | FEAT |
| Approval Designator | ERR-060 |
| Adjustability | ADJUSTABLE |
| Exhaust Valve | INCLUDED |
| Head Harness | INCLUDED |
| Strap Type | SINGLE |
| Filter Replaceability | REPLACEABLE |
| Material | PLASTIC POLYAMIDE NYLON AND PLASTIC MASK |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| R9722A PRIMARY | Square D Co Monroe Plant (USA) |
| Reference | Meaning |
|---|---|
| 50824 | 5/9 Secondary reference U.S. Government activity |
| R9722A | 5/9 Secondary reference American Optical Co |
| 50824 | 5/9 Secondary reference American Optical Co |
NSN 4240-01-250-2271 is a Respirator,air Filtering, manufactured by Square D Co Monroe Plant, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-250-2271 has 1 manufacturer part number on file: R9722A (Square D Co Monroe Plant).
4 possible matches (shared part number, not a government interchangeability claim): 5930-01-423-7956, 5331-01-574-6430, 5315-01-650-6384. Verify interchangeability with system specifications before substitution.
Key specifications for R9722A: Mask Filter Quantity: 1; Filter Type: CARTRIDGE; Mask Type: MOUTH; Material Type: NONELASTIC. 12 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.