Model: C687-17

Optical Element Retaining Ring

Special Features:

32 pitch anti-reflection thread inside surface of both ends, six ea holes 0.1540 in. Dia. Drilled through external flange, external flange has two ea rectangle milled areas 1.812 in. From center of ring diameter to outer edge offlange and 1.000 in. Wide, 1 ea hole 0.110 in. Dia. Drille through external flange, 2 ea holes 0.188 in. Diameter drilled through body of ring

Properties:

Thread Class
3b
Groove Diameter
3.270 inches
Thread Length
0.472 inches
Overall Length
2.343 inches
Outside Diameter
4.688 inches
Thread Size
3.250 in.-32
Aperture Diameter
2.954 inches
Inner Groove Width
0.060 inches
Screw Thread Series Designator
Uns
Thread Location
Internal
Internal Flange Thickness
0.219 inches
Groove Location
Inside face of flange
Knurled Periphery
Not provided
Material
Aluminum alloy, qq-a-225/8
Material
Aluminum alloy 6061
Surface Treatment
Anodized black
NSN
6650-00-499-2802
Part Number
C687-17
Description
Ring,retaining,optical Element
CAGE
34228

A cylindrical item having an internally flanged diameter designed to retain a lens or window in the objective end, or a diopter scale at the viewing end of an optical instrument. It may have one or more of the following characteristics: internal thread or machined for a press fit, method of securing, and/or knurled periphery. For externally threaded items, see retainer, optical element. Excludes cell, optical element; nut, plain knurled; nut, plain round; and ring, retaining.

Part C687-17 NSN 6650-00-499-2802

INC
FIIG
Concept No.
App. Key
Cond. Code
Status
INC:
22585
FIIG:
T271-J
Concept No.:
App. Key:
JC
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

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:
O
SPI No.:
SPI Rev.:
SPC Mkg:
00
LVL_A:
E
LVL_B:
Q

Freight Classification

NMFC
UFC
LTL
LCL
WCC
TCC
SHC
ACC
NMFC:
058110
UFC:
33110
LTL:
200.0
LCL:
200.0
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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