The Protector,hearing, cataloged under National Stock Number 4240-01-675-5172, 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 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-675-5172 |
| Primary Part Number | HYX4 |
| Item Name | Protector,hearing |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | 3m Company |
| Status | ACTIVE |
| Headband Type | ANY ACCEPTABLE |
| 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 |
|---|---|
| HYX4 PRIMARY | 3m Company (USA) |
| 02188112 | Blackwood J. Blackwood & Son Pty Ltd (AUS) |
| 7000104048 PRIMARY | 3m Company (USA) |
| Reference | Meaning |
|---|---|
| XA007707608 | 5/9 Secondary reference 3m Company |
NSN 4240-01-675-5172 is a Protector,hearing, manufactured by 3m Company, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-675-5172 has 3 manufacturer part numbers on file: HYX4 (3m Company), 02188112 (Blackwood J. Blackwood & Son Pty Ltd), 7000104048 (3m Company).
Key specifications for HYX4: Headband Type: ANY ACCEPTABLE; Part Name Assigned by Controlling Agency: HYGIENE KIT; End Item Identification: X4A/X4P3E. 1 specification is 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.