The Frame,spectacle, cataloged under National Stock Number 6540-01-444-4140, is classified within Federal Supply Class 6540 (Ophthalmic Instruments, Equipment, and Supplies) of the Medical, Dental, and Veterinary Equipment group. The manufacturer of record is Randolph Engineering, Inc.. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6540-01-444-4140 |
| Primary Part Number | AF21499-G |
| Item Name | Frame,spectacle |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Manufacturer | Randolph Engineering, Inc. |
| Status | ACTIVE |
| Style Designator | DOUBLE BAR BRIDGE WITH ROCKER NOSE PADS |
| Lens Style | STANDARD DROP OVAL |
| Temple Core | NOT INCLUDED |
| Bridge Width | 20.000 MILLIMETERS MM |
| Surface Treatment | GOLD BRIDGE |
| Surface Treatment | GOLD LENS RIM |
| Surface Treatment | GOLD TEMPLE SECTION |
| Carrying Case | NOT PROVIDED |
| Material | COPPER ALLOY 745 BRIDGE |
| Material | COPPER ALLOY 745 LENS RIM |
| Material | COPPER ALLOY 745 TEMPLE SECTION |
| Largest Diameter | 52.000 MILLIMETERS NOMINAL MM |
| Smallest Diameter | 42.000 MILLIMETERS NOMINAL MM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| AF21499-G PRIMARY | Randolph Engineering, Inc. (USA) |
| Reference | Meaning |
|---|---|
| SKULLTEMPLE42BY52EYE20BRIDGE | 3/9 Design control — primary reference Randolph Engineering, Inc. |
| 97-0104 | 5/1 Secondary reference U.S. Government activity |
NSN 6540-01-444-4140 is a Frame,spectacle, manufactured by Randolph Engineering, Inc., classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
NSN 6540-01-444-4140 has 1 manufacturer part number on file: AF21499-G (Randolph Engineering, Inc.).
Key specifications for AF21499-G: Style Designator: DOUBLE BAR BRIDGE WITH ROCKER NOSE PADS; Lens Style: STANDARD DROP OVAL; Temple Core: NOT INCLUDED; Bridge Width: 20.000 MILLIMETERS MM. 13 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.