The Shell Subassembly,flying Helmet,, cataloged under National Stock Number 8475-01-142-7971, 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 Gentex Corp. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 8475-01-142-7971 |
| Primary Part Number | 81D5331-1 |
| Item Name | Shell Subassembly,flying Helmet, |
| FSC / FSG | 8475 / 84 — Specialized Flight Clothing and Accessories |
| Manufacturer | Gentex Corp |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 8475-01-142-7971 is a Shell Subassembly,flying Helmet,, manufactured by Gentex Corp, classified under FSC 8475, Specialized Flight Clothing and Accessories. Status: active.
NSN 8475-01-142-7971 has 3 manufacturer part numbers on file: D6748-1 (Transaero, Inc.), D6748-1 (Gentex Corp), 81D5331-1 (Gentex Corp).
Key specifications for 81D5331-1: Special Features: SHELL IS A RIGID MATERIAL MADE OFPRESSURE MOLDED LAMINATED GLASS CLOTH; SIZE MEDIUM; WEIGHT 2.350 LBS LBS; Part Name Assigned by Controlling Agency: SHELL SUBASSEMBLY, FLYING HELMET, ANTI-G, ANTIEXPOSURE AND PRESSURE SUIT TYPE; End Item Identification: HGU-55/P HELMET. 0 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.
NSN 8475-01-142-7971 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.