The Earcup,flyer's Helmet, cataloged under National Stock Number 8475-01-396-9577, is classified within Federal Supply Class 8475 (Specialized Flight Clothing and Accessories) of the Clothing, Individual Equipment, and Insignia group. The manufacturer of record is O&s Aviation Srl. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 8475-01-396-9577 |
| Primary Part Number | 79C4401-1 |
| Item Name | Earcup,flyer's Helmet |
| FSC / FSG | 8475 / 84 — Specialized Flight Clothing and Accessories |
| Manufacturer | O&s Aviation Srl |
| Status | ACTIVE |
| Headwear Attachment Method | ADHESIVE |
| Procurement Group Code | 21493 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 79C4401-1 | O&s Aviation Srl (ITA) |
| Reference | Meaning |
|---|---|
| 10346953 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 79C4401 | 5/2 Secondary reference U.S. Government activity |
| 79C4401-1 | 5/9 Secondary reference Bhv Aviation Consultants Gmbh |
| 79C4401-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 8475-01-396-9577 is a Earcup,flyer's Helmet, manufactured by O&s Aviation Srl, classified under FSC 8475, Specialized Flight Clothing and Accessories. Status: active.
NSN 8475-01-396-9577 has 1 manufacturer part number on file: 79C4401-1 (O&s Aviation Srl).
Key specifications for 79C4401-1: Headwear Attachment Method: ADHESIVE; Procurement Group Code: 21493; Part Name Assigned by Controlling Agency: EARPHONE HOLDER; End Item Identification: SAFETY AND SURVIVAL. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.