NSN 6540-00-001-0221 · NIIN 000010221 · Part number LENS,P1.75M0.25, 6.5BC, 71MM DIA
Dispensers Optical Service Corp · FSC 6540 — Ophthalmic Instruments, Equipment, and Supplies · FSG 65 — Medical, Dental, and Veterinary Equipment · CAGE 3N062
Government record, cited
NSN 6540-00-001-0221 — this item is cataloged by the U.S. Government under National Stock Number 6540-00-001-0221. Manufacturer of record part number: LENS,P1.75M0.25, 6.5BC, 71MM DIA.
Also searched as6540-00-001-0221 ·
6540000010221 ·
NIIN 000010221 ·
00-001-0221 ·
FSC 6540 Ophthalmic Instruments, Equipment, and Supplies · CAGE 3N062 · LENS,P1.75M0.25, 6.5BC, 71MM DIA · MILL36824
Departure From Cited Document: AS MODIFIED BYDIAMETER
Nondefinitive Spec/std Data: 3 STYLE AND B CLASS
Identification
NSN: 6540-00-001-0221
NIIN: 000010221
FSC: 6540 — Ophthalmic Instruments, Equipment, and Supplies
FSG: 65 — Medical, Dental, and Veterinary Equipment
Primary part number: LENS,P1.75M0.25, 6.5BC, 71MM DIA
Manufacturer: Dispensers Optical Service Corp
General Description
The Lens,ophthalmic,compound, cataloged under National Stock Number 6540-00-001-0221, 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 Dispensers Optical Service Corp. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 9 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: PR.
Technical Specifications
Parameter
Value
NSN
6540-00-001-0221
Primary Part Number
LENS,P1.75M0.25, 6.5BC, 71MM DIA
Item Name
Lens,ophthalmic,compound
FSC / FSG
6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies
Manufacturer
Dispensers Optical Service Corp
Status
ACTIVE
Base Curve Diopter
7.25 PLUS NOMINAL
Supplementary Features
UNCUT
Style Designator
ROUND
Diameter
71.0 MILLIMETERS MINIMUM MM
Cross-Sectional Shape Style
SPHEROCYLINDER COMPOUND
Departure From Cited Document
AS MODIFIED BYDIAMETER
Nondefinitive Spec/std Data
3 STYLE AND B CLASS
Sphere Curve Inside Diopter
1.75 PLUS MAXIMUM
Light Transmission
UNTINTED
Material
PLASTIC SINGLE VISION
Cylinder Curve Inside Diopter
0.25 MINUS MAXIMUM
Thickness
1.6 MILLIMETERS NOMINAL MM
Lifecycle & Compliance
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
PR
⇄Related Items9
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
6540-00-001-0470LENS,P8.00XM2.00,10BC,71MM DIA.POSSIBLE MATCH
LENS,OPHTHALMIC,COMPOUND
Possible match (shared part number)Dispensers Optical Service Corp
6540-00-001-0586POSSIBLE MATCH
LENS,OPHTHALMIC,COMPOUND
Possible match (shared part number)
6540-00-001-0659P7.25 ON M3.50POSSIBLE MATCH
LENS,OPHTHALMIC,COMPOUND
Possible match (shared part number)Dispensers Optical Service Corp
6540-00-001-0660M7.50 ON M3.50POSSIBLE MATCH
LENS,OPHTHALMIC,COMPOUND
Possible match (shared part number)Dispensers Optical Service Corp
6540-00-001-0727M025M025,6BC,CR-39,71MMDIAPOSSIBLE MATCH
LENS,OPHTHALMIC,COMPOUND
Possible match (shared part number)Dispensers Optical Service Corp
6540-00-001-07280001207289POSSIBLE MATCH
LENS,OPHTHALMIC,COMPOUND
Possible match (shared part number)Dispensers Optical Service Corp
6540-00-001-0729M075M025,4BC,CR-39,71MMDIAPOSSIBLE MATCH
LENS,OPHTHALMIC,COMPOUND
Possible match (shared part number)Dispensers Optical Service Corp
6540-00-001-0736M250M025,4BC,CR-39,71MMDIAPOSSIBLE MATCH
LENS,OPHTHALMIC,COMPOUND
Possible match (shared part number)Dispensers Optical Service Corp
6540-00-001-07670001207671POSSIBLE MATCH
LENS,OPHTHALMIC,COMPOUND
Possible match (shared part number)Dispensers Optical Service Corp
NSN 6540-00-001-0221 is a Lens,ophthalmic,compound, manufactured by Dispensers Optical Service Corp, classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
What part numbers are listed for NSN 6540-00-001-0221?
NSN 6540-00-001-0221 has 1 manufacturer part number on file: LENS,P1.75M0.25, 6.5BC, 71MM DIA (Dispensers Optical Service Corp).
What NSN replaces 6540-00-001-0221?
9 possible matches (shared part number, not a government interchangeability claim): 6540-00-001-0470, 6540-00-001-0586, 6540-00-001-0659. Verify interchangeability with system specifications before substitution.
What are the specifications of LENS,P1.75M0.25, 6.5BC, 71MM DIA?
Key specifications for LENS,P1.75M0.25, 6.5BC, 71MM DIA: Base Curve Diopter: 7.25 PLUS NOMINAL; Supplementary Features: UNCUT; Style Designator: ROUND; Diameter: 71.0 MILLIMETERS MINIMUM MM. 12 specifications are documented in the U.S. Government catalog.
Is NSN 6540-00-001-0221 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.