Se Bifocal Ophthalmic Lens Blank NSN 6540-00-104-4990

Item Description

A transparent optical element consisting of a major blank and a bifocal segment. The blank and segment have been pressed in a glass mold to an approximate size and shape, and are ground and polished to a finished diopter curvature on one surface only.

NSN: 6540-00-104-4990

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Features and Characteristics

Cross Sectional Shape

Sphere

Diameter

65.0 millimeters

Thickness

Any acceptable

Material And Location

Glass, soda-lime single vision and glass, barium bifocal

Additional Power Rating In Diopters

2.250 bifocal

Reading Segment Diameter

25.0 millimeters

Reading Segment Height

17.5 millimeters

Base Curve Diopter

8.25 plus

Cross Curve Diopter

Any acceptable

Light Transmission

Untinted

Sphere Curve Inside Diopter

Any acceptable

Sphere Curve Outside Diopter

Any acceptable

Part Name Assigned By Controlling Agency

Lens blank ophthalmic semifinished bifocal plus 8.25-plus 2.25

Exterior Container Weight

45.00 pounds

Exterior Container Cubic Measure

1.100 cubic feet

Exterior Container Quantity

180

Intermediate Package Quantity

Style Designator

Round with straight top bifocal segment

Unit Of Issue Cube

0.0061 cubic feet

Supplementary Features

Suitable for coating; for use w/aviation spectacle frames

Unit Of Issue Weight

0.25 pounds

Nondefinitive Specification/std Data

1 type and a class

Departure From Cited Designator

As modified by diameter

FSC

6540 Supplies Equipment Ophthalmic Instruments

NIIN

001044990

NSN

6540001044990

Manufacturer Part Numbers

Part numbers registered to this national stock number.

Part Number

Cage

Status

MSDS

Part Number:

MILL16991

Cage Code:

81349

Status:

MSDS:

Foreign Trade & Schedule B

What is a Schedule B number? Find more information at help.cbp.gov

Schedule B Number: 7014001000
NAICS: 327212
SITC: 66595
Description: Lens blanks (other than for spectacles) not optically worked, of glass, (optical elements)
End Use (Code 12770):
Other industrial supplies

Q & A

Frequently asked questions for NSN 6540-00-104-4990

What are the manufacturers of nsn 6540001044990?

Military Specifications (81349)

Does this nsn 6540001044990 have a shelf life?
No. This NSN does not have an applicable shelf life.

What is the formal definition of nsn 6540001044990
A transparent optical element consisting of a major blank and a bifocal segment. the blank and segment have been pressed in a glass mold to an approximate size and shape, and are ground and polished to a finished diopter curvature on one surface only.

Does nsn 6540001044990 contain any precious metals?
No precious metal content.

Does nsn 6540001044990 contain any hazardous materials?
No MSDS. No hazardous material.

What is the ESD classification of nsn 6540001044990?
No known electrostatic discharge.

Identification Group

Item Identification Guide (IIG) and Item Name Code (INC)

INC

FIIG

App. Key

Cond. Code

Status

INC:

30300

FIIG:

A22000

App. Key:

Cond. Code:

Status:

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On Time Delivery
Certificate of Conformance
Quality Inspected Parts
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