Model: 181146PC1

Optical Instrument Window

Special Features:

4 corners 12.7 mm /0.500 in./ radius

Properties:

Diameter

Between 2.5886 inches and 2.5984 inches

Thickness

0.3937 inches

Length

Between 3.4941 inches and 3.5039 inches

Refraction Index

1.5170

Polished Surface

Both

Dispersion

64.5 angstroms

Reflection Reducing Surface

Both

Polished Periphery

Not provided

Material

Glass, mil-g-16592, grade b

Material

Glass, mil-g-16592, grade b

Fsc Application Data

Periscope mk 23, mod 0

NSN

1240-00-171-4220

Part Number

181146PC1

Description

Window,optical Instrument

CAGE

10001

A color free item of transparent or translucent material, usually optical glass, having specific light dispersive and refractive properties. This item must have two plane-parallel surfaces and is designed for use in an optical instrument to provide a barrier to foreign matter and/or permit light transmission in or to the optical system.

Part 181146PC1 NSN 1240-00-171-4220

INC

FIIG

Concept No.

App. Key

Cond. Code

Status

INC:

10908

FIIG:

T271-F

Concept No.:

App. Key:

Cond. Code:

Status:

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators

HMIC

PMIC

ESD/EMI

ENAC

MMAC

CRITL

HMIC:

PMIC:

ESD:

MMAC:

CRITL:

Packaging & Shipping

Est. Pack Size

Est. Pack Weight

Est. Item Weight

Est. Item Dim.

Pack Size:

Paclk Weight:

Item Weight:

Item Dim:

OPI

SPI No.

SPI Rev.

SPC Mkg.

LVL A

LVL B

OPI:

SPI No.:

SPI Rev.:

SPC Mkg:

LVL_A:

LVL_B:

Freight Classification

NMFC

UFC

LTL

LCL

WCC

TCC

SHC

ACC

NMFC:

086700

UFC:

45955

LTL:

RATING VARIABLE

LCL:

WCC:

704

TCC:

SHC:

ACC:

Engineer Supplies

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Schedule B and Export

Schedule B: 9803200000
SITC: 93100
End Use: Military apparel and footwear
NAICS: 990000
USDA: 1

Freight Class: Military equipments not identified by kind