Model: 7688771

Optical Instrument Lens

Special Features:

Left surface edge chamfer 0.010 to 0.020 in. By 45 deg. Right surface edge chamfer 0.050 to 0.060 in. By 45 deg. Both surfaces coated with magnesium fluoride. Rim and chamfers ground.

Properties:

Diameter
Between 1.097 inches and 1.100 inches
Axial Thickness
Between 0.241 inches and 0.251 inches
Equivalent Focal Length
-0.927 inches
Back Focal Length
-0.961 inches
Refraction Index
1.6890
Abbe Constant
30.900
Single Lens Style
Double concave
Element Left Surface Radius
2.774 inches
Element Right Surface Radius
0.860 inches
Material
Glass, optical, mil-g-174, grade c, type 689-309
Material
Glass, optical, mil-g-174, grade c, type 689-309
Fsc Application Data
Periscope, tank
NSN
6650-00-768-8771
Part Number
7688771
Description
Lens,optical Instrument
CAGE
19200

An unmounted, transparent, color free lens which may be treated with a low reflection coating to increase light transmission. Includes single and compound elements. For items having two plane parallel surfaces, see window, optical instrument. Excludes reticle, optical instrument.

Part 7688771 NSN 6650-00-768-8771

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
21884
FIIG:
T271-E
Concept No.:
1
App. Key:
EA
Cond. Code:
2
Status:
A

Material Classification

Hazardous material, precious metals, criticality, enviroment, and electrostatic discharge indicators
HMIC
PMIC
ESD/EMI
ENAC
MMAC
CRITL
HMIC:
N
PMIC:
A
ESD:
ESD:
MMAC:
CRITL:
X

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
057940
UFC:
33020
LTL:
RATING VARIABLE
LCL:
RATING VARIABLE
WCC:
744
TCC:
Z
SHC:
9
ACC:
Medical Supplies

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Schedule B and Export
  • Schedule B: 9018500000
  • SITC: 87225
  • End Use: Medicinal equipment
  • NAICS: 339115
  • USDA: 1

Freight Class: Other ophthalmic instruments and appliances and parts and accessories

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