The Protector,hearing, cataloged under National Stock Number 4240-01-538-7970, is classified within Federal Supply Class 4240 (Safety and Rescue Equipment) of the Fire Fighting, Rescue, and Safety Equipment group. Government technical data includes 4 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Protector,hearing |
| FSC / FSG | 4240 — Safety and Rescue Equipment (FSG 42) |
| Parameter | Value |
|---|---|
| NSN | 4240-01-538-7970 |
| Item Name | Protector,hearing |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Status | ACTIVE |
| Body Style | HEADSET, COVERED |
| Special Test Features | FULLY ADJUSTABLE HEADBAND ERGONOMICALLY ENGINEERED TO REDUCE PRESSURE POINTS; SOFT, CONFORMABLE RINGS PROVIDE A BETTER SEAL; STYLISH, TWO COLOR DESIGN |
| Supplementary Features | LOW-PROFILE CUPS WITH CUT-OUTS ARE IDEAL FOR USE WITH RIFLES AND SHOTGUNS; FOLDABLE FOR STORAGE, PROTECTION AND PORTABILITY; LIGHTWEIGHT AND COMFORTABLE FOR EXTENDED WEAR |
| Headband Type | ADJUSTABLE DOUBLE BAND |
| 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 |
|---|---|
| 7100088578 | C/1 Advisory reference — outside the item-of-supply concept 3m Company |
| 97040-PEL-6C | 3/9 Design control — primary reference 3m Company |
| 97011-00000 | 5/9 Secondary reference 3m Company |
| 97011 | 5/9 Secondary reference Brock Sales Company |
| 97011-00000 | 5/9 Secondary reference Brock Sales Company |
| 97012-2C | 5/9 Secondary reference 3m Company |
NSN 4240-01-538-7970 is a Protector,hearing, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
Key specifications for 4240-01-538-7970: Body Style: HEADSET, COVERED; Special Test Features: FULLY ADJUSTABLE HEADBAND ERGONOMICALLY ENGINEERED TO REDUCE PRESSURE POINTS; SOFT, CONFORMABLE RINGS PROVIDE A BETTER SEAL; STYLISH, TWO COLOR DESIGN; Supplementary Features: LOW-PROFILE CUPS WITH CUT-OUTS ARE IDEAL FOR USE WITH RIFLES AND SHOTGUNS; FOLDABLE FOR STORAGE, PROTECTION AND PORTABILITY; LIGHTWEIGHT AND COMFORTABLE FOR EXTENDED WEAR; Headband Type: ADJUSTABLE DOUBLE BAND. 4 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.