The Spectacles,industrial, cataloged under National Stock Number 4240-01-504-0994, 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 Wiley X, Inc. Dba Wiley X 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4240-01-504-0994 |
| Primary Part Number | SG-1 |
| Item Name | Spectacles,industrial |
| FSC / FSG | 4240 / 42 — Safety and Rescue Equipment |
| Manufacturer | Wiley X, Inc. Dba Wiley X Inc |
| Status | ACTIVE |
| Over Other Spectacles Usage Design | NOT INCLUDED |
| Material | PLASTIC POLYCARBONATE LENS |
| 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 |
|---|---|
| SG-1 PRIMARY | Wiley X, Inc. Dba Wiley X Inc (USA) |
| Reference | Meaning |
|---|---|
| SG-1B | 5/9 Secondary reference Wiley X, Inc. Dba Wiley X Inc |
NSN 4240-01-504-0994 is a Spectacles,industrial, manufactured by Wiley X, Inc. Dba Wiley X Inc, classified under FSC 4240, Safety and Rescue Equipment. Status: active.
NSN 4240-01-504-0994 has 1 manufacturer part number on file: SG-1 (Wiley X, Inc. Dba Wiley X Inc).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-565-1709. Verify interchangeability with system specifications before substitution.
Key specifications for SG-1: Over Other Spectacles Usage Design: NOT INCLUDED; Special Features: MEETS ANSI Z87.1+ REQUIREMENTS FOR SPECTACLES AND THE BALLISTIC IMPACT REQUIREMENTS OF MIL-PRF-31013, PARAGRAPH 3.5.1.1, SPECTACLES ARE SUPPLIED WITH CLEAR AND GREEN SMOKE LENSES. SPECTACLES HAVE ANIT-FOG LENSES AND ULTRA-FOAM SEALS AROUND EYE ORBITS; Material: PLASTIC POLYCARBONATE LENS. 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.