The Filter Adapter,fullface, cataloged under National Stock Number 4240-01-320-1956, 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 3m Company. Government technical data includes 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-320-1956 |
| Primary Part Number | 502 |
| Item Name | Filter Adapter,fullface |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | 3m Company |
| Status | ACTIVE |
| General Characteristics Item Description | SOLE SOURCE REQUIRED BY STATUTE 6.302; 100 EACH PER BOX |
| Criticality Code Justification | TEXT |
| 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 |
|---|---|
| 502 PRIMARY | 3m Company (USA) |
| Reference | Meaning |
|---|---|
| 7000001931 | C/1 Advisory reference — outside the item-of-supply concept 3m Company |
| 502 | 5/9 Secondary reference 3m Company Div Oh&esd |
NSN 4240-01-320-1956 is a Filter Adapter,fullface, manufactured by 3m Company, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-320-1956 has 1 manufacturer part number on file: 502 (3m Company).
Key specifications for 502: General Characteristics Item Description: SOLE SOURCE REQUIRED BY STATUTE 6.302; 100 EACH PER BOX; Criticality Code Justification: TEXT. 2 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.