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12FSN11C — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

12FSN11C: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 11.875 INCHES NOMINAL IN, length: 18.125 INCHES NOMINAL IN, material: IRON CAST, inside_width: 11.000 INCHES NOMINAL IN, corner_radius: 1.062 INCHES NOMINAL IN, hole_diameter: 0.438 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-388-1932, 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
12FSN11C
NSN: 5340-00-388-1932
FSC: 5340 — Hardware, Commercial
CAGE: 14541 — COOPER MACHINERY SERVICES LLC (USA)
SPECIFICATIONS
width11.875 INCHES NOMINAL IN
length18.125 INCHES NOMINAL IN
materialIRON CAST
ear_quantity1
inside_width11.000 INCHES NOMINAL IN
corner_radius1.062 INCHES NOMINAL IN
hole_diameter0.438 INCHES MINIMUM AND 0.688 INCHES MAXIMUM IN
inside_length16.812 INCHES NOMINAL IN
body_thickness0.188 INCHES NOMINAL IN
flange_thickness0.188 INCHES NOMINAL IN
inside_corner_radius0.688 INCHES NOMINAL IN
securing_device_typeTHREADED FASTENER
NSN5340-00-388-1932
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 12FSN11C 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
•
EAR QUANTITY: 1
•
INSIDE WIDTH: 11.000 INCHES NOMINAL IN
•
CORNER RADIUS: 1.062 INCHES NOMINAL IN
•
LENGTH: 18.125 INCHES NOMINAL IN
•
INSIDE LENGTH: 16.812 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 4.375 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.188 INCHES NOMINAL IN
•
INSIDE CORNER RADIUS: 0.688 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
EAR QUANTITY1
INSIDE WIDTH11.000 INCHES NOMINAL IN
CORNER RADIUS1.062 INCHES NOMINAL IN
LENGTH18.125 INCHES NOMINAL IN
INSIDE LENGTH16.812 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG LENGTH4.375 INCHES NOMINAL IN
FLANGE THICKNESS0.188 INCHES NOMINAL IN
INSIDE CORNER RADIUS0.688 INCHES NOMINAL IN
FIRST RECESS INSIDE HEIGHT1.312 INCHES NOMINAL IN
HOLE QUANTITY ALONG LENGTH4
OTHER ITEMS IN FSC 5340 — Hardware, Commercial
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5340-00-000-0068 5340-00-000-0132 5340-00-000-8150 5340-00-001-1251 5340-00-001-1264 5340-00-001-1265 5340-00-001-1266 5340-00-001-1275
SUBSTITUTES & CROSS-REFERENCES 2
FSC11CPC28Reference document
Same NSN cross-reference
Reference document — Secondary reference
FSBA11DPC28Reference document
Same NSN cross-reference
Reference document — Secondary reference
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 12FSN11C?
12FSN11C is a COVER,ACCESS.
What parts can replace 12FSN11C?
There are 2 known substitutes for 12FSN11C: FSC11CPC28, FSBA11DPC28. Substitute compatibility should be verified for your specific system.
What is the NSN for 12FSN11C?
12FSN11C is cataloged in the U.S. Government catalog under NSN 5340-00-388-1932. 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.