The Blocks,optical Fabrication, cataloged under National Stock Number 6540-01-451-6288, 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 Coburn Technologies, Inc.. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6540-01-451-6288 |
| Primary Part Number | 170451 |
| Item Name | Blocks,optical Fabrication |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Manufacturer | Coburn Technologies, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | 10 DIOPTER BASE CURVE; FOR USE WITH THE GERBER STEP ONE SYSTEM IN BLOCKING OPTICAL LENSES; UNIT PKG QTY: 10 BLOCKS |
| 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 |
|---|---|
| 170451 PRIMARY | Coburn Technologies, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 170451 | 5/9 Secondary reference Gerber Coburn Optical, Inc |
| 97-0860 | 5/1 Secondary reference U.S. Government activity |
NSN 6540-01-451-6288 is a Blocks,optical Fabrication, manufactured by Coburn Technologies, Inc., classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
NSN 6540-01-451-6288 has 1 manufacturer part number on file: 170451 (Coburn Technologies, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5331-01-475-3911. Verify interchangeability with system specifications before substitution.
Key specifications for 170451: General Characteristics Item Description: 10 DIOPTER BASE CURVE; FOR USE WITH THE GERBER STEP ONE SYSTEM IN BLOCKING OPTICAL LENSES; UNIT PKG QTY: 10 BLOCKS; Part Name Assigned by Controlling Agency: BLOCKS OPTICAL FABRCTNDIOPTER BASE CURVEU/W GERBER ONE STEP SYS. 1 specification is 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.