851-7540 — WINDOW,OBSERVATION

✓ Government record, cited

— · COMPONENT

PRODUCT OVERVIEW

851-7540: WINDOW,OBSERVATION.

The WINDOW,OBSERVATION is a the manufacturer industrial component. Key specifications include material: PLASTIC ACRYLIC, edge_type: FLAT FINISH, surface_finish: FINE FINISHED, overall_diameter: 4.000 INCHES NOMINAL IN, special_features: PROTECTIVE COVERING MATERIAL ON BOTH SIDES, style_designator: CIRCULAR. This part is cataloged in the U.S.

Government catalog under NSN 9330-01-063-5931, 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

851-7540

NSN: 9330-01-063-5931
FSC: 9330 — Plastics Fabricated Materials
CAGE: 0EXU3 — AQUA-CHEM, INC. DBA AQUA-CHEM INC (USA)

SPECIFICATIONS

material	PLASTIC ACRYLIC
edge_type	FLAT FINISH
surface_finish	FINE FINISHED
overall_diameter	4.000 INCHES NOMINAL IN
special_features	PROTECTIVE COVERING MATERIAL ON BOTH SIDES
style_designator	CIRCULAR
overall_thickness	0.750 INCHES NOMINAL IN
material_transparency	CLEAR
environmental_protection	HIGH TEMPERATURE RESISTANT AND WEATHER RESISTANT
minimum_tensile_strength	8000 POUNDS PER SQUARE INCH LBS
nondefinitive_spec/std_data	A FINISH
heat_absorbing_characteristic	HIGH LIGHT TRANSMISSION
NSN	9330-01-063-5931

COMPONENT DIAGRAM

KEY FEATURES

•

OVERALL DIAMETER: 4.000 INCHES NOMINAL IN

•

SURFACE FINISH: FINE FINISHED

•

OVERALL THICKNESS: 0.750 INCHES NOMINAL IN

•

MATERIAL TRANSPARENCY: CLEAR

•

STYLE DESIGNATOR: CIRCULAR

•

MATERIAL DOCUMENT AND CLASSIFICATION: MIL-P-5425,FINISH A MIL SPEC SINGLE MATERIAL RESPONSE

•

NONDEFINITIVE SPEC/STD DATA: A FINISH

•

EDGE TYPE: FLAT FINISH

TECHNICAL CHARACTERISTICS

OVERALL DIAMETER	4.000 INCHES NOMINAL IN
SURFACE FINISH	FINE FINISHED
OVERALL THICKNESS	0.750 INCHES NOMINAL IN
MATERIAL TRANSPARENCY	CLEAR
STYLE DESIGNATOR	CIRCULAR
MATERIAL DOCUMENT AND CLASSIFICATION	MIL-P-5425,FINISH A MIL SPEC SINGLE MATERIAL RESPONSE
NONDEFINITIVE SPEC/STD DATA	A FINISH
EDGE TYPE	FLAT FINISH
SPECIAL FEATURES	PROTECTIVE COVERING MATERIAL ON BOTH SIDES
ENVIRONMENTAL PROTECTION	HIGH TEMPERATURE RESISTANT AND WEATHER RESISTANT

OTHER ITEMS IN FSC 9330 — Plastics Fabricated Materials

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

9330-00-001-6009 9330-00-003-0266 9330-00-003-1162 9330-00-003-2789 9330-00-003-3321 9330-00-003-6171 9330-00-003-7116 9330-00-003-8580

SUBSTITUTES & CROSS-REFERENCES 4

633-8054-16Reference document

Same NSN cross-reference

Reference document — Secondary reference

MIL-P-5425Reference document

Same NSN cross-reference

Reference document — Identification reference

492-851-7540Same NSN cross-reference

Same NSN cross-reference

Also cataloged under this NSN

9330PL0792196Reference document

Same NSN cross-reference

Reference document — Informative reference only

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 851-7540?

851-7540 is a WINDOW,OBSERVATION.

What parts can replace 851-7540?

There are 4 known substitutes for 851-7540: 633-8054-16, MIL-P-5425, 492-851-7540 and 1 more. Substitute compatibility should be verified for your specific system.

What is the NSN for 851-7540?

851-7540 is cataloged in the U.S. Government catalog under NSN 9330-01-063-5931. This indicates validated use in U.S. government and defense supply chains.

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851-7540 — WINDOW,OBSERVATION

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