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188C197 — PLATE,RETAINING,WINDOW

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

188C197: PLATE,RETAINING,WINDOW.

The PLATE,RETAINING,WINDOW is a the manufacturer industrial component. Key specifications include shape: SPECIAL PLATE, width: 7.000 INCHES NOMINAL OVERALL IN, length: 7.500 INCHES NOMINAL OVERALL IN, diameter: 0.213 INCHES NOMINAL MOUNTING HOLE IN, material: ALUMINUM ALLOY 2024 OVERALL, thickness: 0.313 INCHES NOMINAL OVERALL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-693-5837, 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
188C197
NSN: 5340-00-693-5837
FSC: 5340 — Hardware, Commercial
CAGE: 03538 — LOCKHEED MARTIN CORPORATION DIV RMS (USA)
SPECIFICATIONS
shapeSPECIAL PLATE
width7.000 INCHES NOMINAL OVERALL IN
length7.500 INCHES NOMINAL OVERALL IN
diameter0.213 INCHES NOMINAL MOUNTING HOLE IN
materialALUMINUM ALLOY 2024 OVERALL
thickness0.313 INCHES NOMINAL OVERALL IN
special_featuresMATL HARDNESS RATING-NOT RATED;RAISED SURFACE FEATURE-NOT INCLUDED;APERTURE-NOT INCLUDED
mounting_hole_typeUNTHREADED
mounting_configurationEQUALLY SPACED AROUND FRAME
mounting_hole_quantity12
end_item_identificationGUN SIGHT MK31
NSN5340-00-693-5837
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 188C197 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MOUNTING HOLE QUANTITY: 12
•
LENGTH: 7.500 INCHES NOMINAL OVERALL IN
•
DIAMETER: 0.213 INCHES NOMINAL MOUNTING HOLE IN
•
SHAPE: SPECIAL PLATE
•
MOUNTING CONFIGURATION: EQUALLY SPACED AROUND FRAME
•
WIDTH: 7.000 INCHES NOMINAL OVERALL IN
TECHNICAL CHARACTERISTICS
MOUNTING HOLE QUANTITY12
LENGTH7.500 INCHES NOMINAL OVERALL IN
DIAMETER0.213 INCHES NOMINAL MOUNTING HOLE IN
SHAPESPECIAL PLATE
SPECIAL FEATURESMATL HARDNESS RATING-NOT RATED;RAISED SURFACE FEATURE-NOT INCLUDED;APERTURE-NOT INCLUDED
MOUNTING CONFIGURATIONEQUALLY SPACED AROUND FRAME
WIDTH7.000 INCHES NOMINAL OVERALL IN
END ITEM IDENTIFICATIONGUN SIGHT MK31
MATERIALALUMINUM ALLOY 2024 OVERALL
THICKNESS0.313 INCHES NOMINAL OVERALL IN
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Semi-active item — no replacement plannedNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 188C197?
188C197 is a PLATE,RETAINING,WINDOW.
What is the NSN for 188C197?
188C197 is cataloged in the U.S. Government catalog under NSN 5340-00-693-5837. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.