The Clamp,adapter,mask, cataloged under National Stock Number 4240-01-164-2161, 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 Biomarine Inc. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-164-2161 |
| Primary Part Number | 45-331-4 |
| Item Name | Clamp,adapter,mask |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Biomarine Inc |
| Status | ACTIVE |
| General Characteristics Item Description | PART OF MASK AND ASSEMBLY MAXISEAL P/N 45-331; USED ON MASK AND HOSE ASSEMBLY MAXISEAL P/N 45-600A A |
| Reference Data and Literature | AF TO. 14S5-19-11 |
| 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 |
|---|---|
| 45-331-4 PRIMARY | Biomarine Inc (USA) |
NSN 4240-01-164-2161 is a Clamp,adapter,mask, manufactured by Biomarine Inc, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-164-2161 has 1 manufacturer part number on file: 45-331-4 (Biomarine Inc).
Key specifications for 45-331-4: General Characteristics Item Description: PART OF MASK AND ASSEMBLY MAXISEAL P/N 45-331; USED ON MASK AND HOSE ASSEMBLY MAXISEAL P/N 45-600A A; Reference Data and Literature: AF TO. 14S5-19-11; End Item Identification: SELF-CONTAINED BREATHING APPARATUS,4240010618444 AND 4240010618443. 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.