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3866-F-136 — COVER,ACCESS

✓ Government record, cited
— · ORING SEAL
PRODUCT OVERVIEW

3866-F-136: COVER,ACCESS.

The COVER,ACCESS is a the manufacturer industrial component. Key specifications include width: 5.250 INCHES NOMINAL IN, length: 5.250 INCHES NOMINAL IN, material: STEEL, pilot_height: 0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN, corner_radius: 0.625 INCHES NOMINAL IN, hole_diameter: 0.656 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5340-00-615-9511, 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
3866-F-136
NSN: 5340-00-615-9511
FSC: 5340 — Hardware, Commercial
CAGE: 49185 — TEREX AMERICAN CRANE CORP (USA)
SPECIFICATIONS
width5.250 INCHES NOMINAL IN
length5.250 INCHES NOMINAL IN
materialSTEEL
pilot_height0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
corner_radius0.625 INCHES NOMINAL IN
hole_diameter0.656 INCHES NOMINAL IN
pilot_diameter3.869 INCHES MINIMUM AND 3.872 INCHES MAXIMUM IN
flange_thickness0.557 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
special_featuresDRILLED AND TAPPED THRU TOP OF COVER,0.125-27 NPSF
surface_treatmentPAINT
securing_device_typeTHREADED FASTENER
peripheral_shape_styleRECTANGLE, FOUR HOLES
NSN5340-00-615-9511
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: 3866-F-136 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
•
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH: 0.625 INCHES NOMINAL IN
•
CORNER RADIUS: 0.625 INCHES NOMINAL IN
•
LENGTH: 5.250 INCHES NOMINAL IN
•
DISTANCE BETWEEN HOLES ALONG LENGTH: 4.000 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.557 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
•
DISTANCE BETWEEN HOLES ALONG WIDTH: 4.000 INCHES NOMINAL IN
•
MOUNTING OPENING SHAPE STYLE: UNTHREADED HOLE
•
SECURING DEVICE TYPE: THREADED FASTENER
TECHNICAL CHARACTERISTICS
DISTANCE FROM FIRST HOLE CENTERLINE TO END ALONG WIDTH0.625 INCHES NOMINAL IN
CORNER RADIUS0.625 INCHES NOMINAL IN
LENGTH5.250 INCHES NOMINAL IN
DISTANCE BETWEEN HOLES ALONG LENGTH4.000 INCHES NOMINAL IN
FLANGE THICKNESS0.557 INCHES MINIMUM AND 0.562 INCHES MAXIMUM IN
DISTANCE BETWEEN HOLES ALONG WIDTH4.000 INCHES NOMINAL IN
MOUNTING OPENING SHAPE STYLEUNTHREADED HOLE
SECURING DEVICE TYPETHREADED FASTENER
PILOT DIAMETER3.869 INCHES MINIMUM AND 3.872 INCHES MAXIMUM IN
PILOT HEIGHT0.182 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN
SUBSTITUTES & CROSS-REFERENCES 6
42SQ12Reference document
Same NSN cross-reference
Reference document — Secondary reference
2116420Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
9SK0452Reference document
Same NSN cross-reference
Reference document — Secondary reference
245425Reference document
Same NSN cross-reference
Reference document — Secondary reference
12C7090Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
394783Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 3866-F-136?
3866-F-136 is a COVER,ACCESS.
What parts can replace 3866-F-136?
There are 6 known substitutes for 3866-F-136: 42SQ12, 2116420, 9SK0452 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 3866-F-136?
3866-F-136 is cataloged in the U.S. Government catalog under NSN 5340-00-615-9511. 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.