689C2140 — WINDOW,OBSERVATION

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

689C2140: WINDOW,OBSERVATION.

The WINDOW,OBSERVATION is a the manufacturer industrial component. Key specifications include material: GLASS, overall_width: 8.420 INCHES NOMINAL IN, overall_length: 11.820 INCHES NOMINAL IN, style_designator: ROUNDED CORNERS, overall_thickness: 0.375 INCHES NOMINAL IN, first_corner_radius: 0.250 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 9340-01-232-7331, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS

689C2140

NSN: 9340-01-232-7331
FSC: 9340 — Glass Fabricated Materials
CAGE: 81755 — LOCKHEED MARTIN CORPORATION DIV LOCKHEED MARTIN AERONAUTICS COMPANY (USA)

SPECIFICATIONS

material	GLASS
overall_width	8.420 INCHES NOMINAL IN
overall_length	11.820 INCHES NOMINAL IN
style_designator	ROUNDED CORNERS
overall_thickness	0.375 INCHES NOMINAL IN
first_corner_radius	0.250 INCHES NOMINAL IN
third_corner_radius	0.250 INCHES NOMINAL IN
fourth_corner_radius	0.250 INCHES NOMINAL IN
second_corner_radius	0.250 INCHES NOMINAL IN
material_transparency	CLEAR
end_item_identification	COUNTERMEASURES RECEIVING SET,AN/FLR-9,DFDC MOD KIT
material_document_and_classification	DD-G-451,TYPE 1,CLASS 1 FED SPEC SINGLE MATERIAL RESPONSE
NSN	9340-01-232-7331

COMPONENT DIAGRAM

KEY FEATURES

•

FOURTH CORNER RADIUS: 0.250 INCHES NOMINAL IN

•

FIRST CORNER RADIUS: 0.250 INCHES NOMINAL IN

•

SECOND CORNER RADIUS: 0.250 INCHES NOMINAL IN

•

OVERALL THICKNESS: 0.375 INCHES NOMINAL IN

•

MATERIAL TRANSPARENCY: CLEAR

•

STYLE DESIGNATOR: ROUNDED CORNERS

•

MATERIAL DOCUMENT AND CLASSIFICATION: DD-G-451,TYPE 1,CLASS 1 FED SPEC SINGLE MATERIAL RESPONSE

TECHNICAL CHARACTERISTICS

FOURTH CORNER RADIUS	0.250 INCHES NOMINAL IN
FIRST CORNER RADIUS	0.250 INCHES NOMINAL IN
SECOND CORNER RADIUS	0.250 INCHES NOMINAL IN
OVERALL THICKNESS	0.375 INCHES NOMINAL IN
MATERIAL TRANSPARENCY	CLEAR
STYLE DESIGNATOR	ROUNDED CORNERS
MATERIAL DOCUMENT AND CLASSIFICATION	DD-G-451,TYPE 1,CLASS 1 FED SPEC SINGLE MATERIAL RESPONSE
OVERALL LENGTH	11.820 INCHES NOMINAL IN
OVERALL WIDTH	8.420 INCHES NOMINAL IN
END ITEM IDENTIFICATION	COUNTERMEASURES RECEIVING SET,AN/FLR-9,DFDC MOD KIT

OTHER ITEMS IN FSC 9340 — Glass Fabricated Materials

Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.

9340-00-001-2702 9340-00-001-3590 9340-00-001-3591 9340-00-001-3592 9340-00-003-0380 9340-00-003-1497 9340-00-003-1553 9340-00-003-7325

SUBSTITUTES & CROSS-REFERENCES 1

689C2140-3Reference document

Same NSN cross-reference

Reference document — Secondary reference

LIFECYCLE

NSN statusActive· U.S. Government catalog

Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required

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FREQUENTLY ASKED QUESTIONS

What is 689C2140?

689C2140 is a WINDOW,OBSERVATION.

What parts can replace 689C2140?

There is 1 known substitute for 689C2140: 689C2140-3. Substitute compatibility should be verified for your specific system.

What is the NSN for 689C2140?

689C2140 is cataloged in the U.S. Government catalog under NSN 9340-01-232-7331. This indicates validated use in U.S. government and defense supply chains.

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689C2140 — WINDOW,OBSERVATION

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